Raees Swati | Institute of Space Technology (original) (raw)

Papers by Raees Swati

Research paper thumbnail of Energies

Research paper thumbnail of Comparison of Optimization Techniques and Objective Functions Using Gas Generator and Staged Combustion LPRE Cycles

Applied Sciences

This paper compares various optimization techniques and objective functions to obtain optimum roc... more This paper compares various optimization techniques and objective functions to obtain optimum rocket engine performances. This research proposes a modular optimization framework that provides an optimum design for Gas Generator (GG) and Staged Combustion (SC) Liquid Propellant Rocket Engines. This process calculates the ideal rocket engine performance by applying seven different optimization techniques: Simulated Annealing (SA), Nelder Mead (NM), Cuckoo Search Algorithm (CSA), Particle Swarm Optimization (PSO), Pigeon-Inspired Optimization (PIO), Genetic Algorithm (GA) and a novel hybrid GA-PSO technique named GA-Swarm. This new technique combines the superior search capability of GA with the efficient constraint matching capability of PSO. This research also compares objective functions to determine the most suitable function for GG and SC cycle rocket engines. Three single objective functions are used to minimize the Gross Lift-Off Weight and to maximize Specific Impulse and the T...

Research paper thumbnail of Effect of Secondary Combustion on Thrust Regulation of Gas Generator Cycle Rocket Engine

Applied Sciences

Thrust regulation is applied to maintain the performance of the liquid propellant rocket engine. ... more Thrust regulation is applied to maintain the performance of the liquid propellant rocket engine. The thrust level of a rocket engine can be readily controlled by adjusting the number of propellants introduced into the combustion chamber. In this study, a gas generator design is proposed in which thrust regulation is maintained by performing secondary combustion in the divergent section of the nozzle of a gas generator. Tangential and normal injection techniques have also been studied for better combustion analyses. A normal injection technique is used for the experiment and CFD results are validated with the experimental data. Chemical equilibrium analyses are also performed by minimizing Gibbs free energy with the steepest descent method augmented by the Nelder–Mead algorithm. These equilibrium calculations give the combustion species as obtained through the CFD results. Performance evaluation of the rocket engine, with and without secondary combustion in the gas generator, led to ...

Research paper thumbnail of Micro-Mechanical Investigation of Interfacial Debonding in Carbon Fiber-Reinforced Composites Using Extended Finite Element Method (XFEM) Approach

Micromachines

The interface debonding in carbon fiber-reinforced polymers is analyzed and evaluated using the e... more The interface debonding in carbon fiber-reinforced polymers is analyzed and evaluated using the extended finite element method (XFEM). In order to accurately evaluate the bonding properties between fibers and matrix, different tests were carried out, including the multiple tests for different orientations to study longitudinal, transversal, and shear properties of unidirectional carbon fiber-reinforced composites. Extensive experimentation has been performed in all the different groups and categories with different dimensions and parameters in order to ascertain the values of strength and the prediction of the damage to the structure. The experimental and numerical comparison provided significant trends and data to evaluate the mechanical properties of the interface. The values of stiffness and strength are compared and validated. Development of Representative Volume Element (RVE) for progressive damage model to these damage phenomena has already been performed as a feasibility stud...

Research paper thumbnail of Crashworthiness study of UCAV’s main landing gear using explicit dynamics

International Journal of Crashworthiness, 2022

Research paper thumbnail of Automatic Sorting, Counting and Bottle Filling Robotic Station

This project is aimed at automating the sorting and bottle filling. This project will automatical... more This project is aimed at automating the sorting and bottle filling. This project will automatically sort bottle according to their size by using IR sensors. Then it sorts the bottle on the designated portion of conveyor belt and passes it to the Solenoid Operated Valves to fill the bottles. The overall system is liberated from human intervention. The system is comprehensive and efficient, thus can help in automating the sorting, counting and bottle filling.

Research paper thumbnail of Stress Analysis for variable frequency Spline Shaft under Torsion

Research paper thumbnail of Design and Structural Analysis of Weight Optimized Main Landing Gears for UAV Under Impact Loading

Journal of Space Technology

Landing gears being the most critical part of an aircraft must be designed to withstand the worst... more Landing gears being the most critical part of an aircraft must be designed to withstand the worst scenario in a mission profile i.e., loading conditions. While in an unmanned aerial vehicles, weight optimization is one of the important concerns for Analysis. The structure is designed considering the values of stresses, strains/deformations and stress intensities using computational tools for the maximum values of loads, with a reasonable & logical safety factor. Keeping in view all the parameters, weight is optimized in a way such that an optimized structure for the landing gear can with stand deformations. Commercially available computational tools are used for the evaluation of initial structure design in Tri-cycle Model (Model-01) & modified model (Model-02). The models were used for computation of stresses, strains, stress intensities and finally a lightweight and reliable structure design is evolved.

Research paper thumbnail of Construction of Horizontal Axis Wind Turbines A beginners Approach

The most important component of a Wind Energy Converter is the rotor. The efficiency of a rotor i... more The most important component of a Wind Energy Converter is the rotor. The efficiency of a rotor is characterized by its profile (airfoil section) and the corresponding aerodynamic design. The NACA 4415 is selected as an aerofoil for the rotor due to its increased efficiency. A light with a good strength is used for the blades. The blade is carved at different blade angles.Alternator is made of two components, magnet rotor and stator. Magnet rotor is mild steel disk with magnets positioned on it using molding process. Stator is made of 9 coils. Each coil with 220 turns number of turns. The stator is sandwiched between the magnet rotors. With the rotary motion of magnet rotors, flux is generated and hence AC voltage is in the coil which is converted into DC voltage with the help of bridge rectifiers. The output in the form of DC volt is used to charge the battery. The furling system is used for rotating the turbine to the desired direction of the wind.

Research paper thumbnail of NOx Emission Prediction Analysis and Comparison in Gas Turbine Combustor Utilizing CFD and CRN Combined Approach

2019 Sixth International Conference on Aerospace Science and Engineering (ICASE), 2019

Prediction of Nitrous oxides (NOx) emission and development in combustion burning devices utilizi... more Prediction of Nitrous oxides (NOx) emission and development in combustion burning devices utilizing numerical simulation is significant now days because of strict legislation about environment impact of contaminated gases. This work managed consolidates approach of Computational Fluid Dynamics (CFD) and Chemical Reactor Networking (CRN) method to analyze the pollutant discharged NOx from gas turbine Ignition chamber. A 2D model was created of the gas turbine combustor utilizing design tool and CFD simulations were done by using FLUENT software and determined the data about the flow field, temperature, velocity insight the combustor by varying the equivalence ratios, using methane gas (CH4) as burning fuel. On the base of CFD data 2 CRN models were made, the first one depended on 5 PSR's CRN reactors which divided the combustor into 5 flame sections that named as primary CRN model and the second one was increased number of CRN reactors with 12 flame sections that contained 12 PSR...

Research paper thumbnail of CFD analysis on the effects of distorted inlet flows with variable RPM on the stability of the transonic micro-compressor

Research paper thumbnail of Response of piezoelectric materials on thermomechanical shocking and electrical shocking for aerospace applications

Research paper thumbnail of Piezoelectric thermo electromechanical energy harvester for reconnaissance satellite structure

Research paper thumbnail of Weight Optimized Main Landing Gears for UAV under Impact Loading for Evaluation of Explicit Dynamics Study

Research paper thumbnail of Weight Optimized Main Landing Gears for UAV under Impact Loading for Evaluation of Explicit Dynamics Study

Research paper thumbnail of Lec-01

• Now let us build the geometry in ANSYS. The strategy to create the desired geometry is by first... more • Now let us build the geometry in ANSYS. The strategy to create the desired geometry is by first creating the key points where the loads will be applied and then uniting these key points with lines.

Research paper thumbnail of Energies

Research paper thumbnail of Comparison of Optimization Techniques and Objective Functions Using Gas Generator and Staged Combustion LPRE Cycles

Applied Sciences

This paper compares various optimization techniques and objective functions to obtain optimum roc... more This paper compares various optimization techniques and objective functions to obtain optimum rocket engine performances. This research proposes a modular optimization framework that provides an optimum design for Gas Generator (GG) and Staged Combustion (SC) Liquid Propellant Rocket Engines. This process calculates the ideal rocket engine performance by applying seven different optimization techniques: Simulated Annealing (SA), Nelder Mead (NM), Cuckoo Search Algorithm (CSA), Particle Swarm Optimization (PSO), Pigeon-Inspired Optimization (PIO), Genetic Algorithm (GA) and a novel hybrid GA-PSO technique named GA-Swarm. This new technique combines the superior search capability of GA with the efficient constraint matching capability of PSO. This research also compares objective functions to determine the most suitable function for GG and SC cycle rocket engines. Three single objective functions are used to minimize the Gross Lift-Off Weight and to maximize Specific Impulse and the T...

Research paper thumbnail of Effect of Secondary Combustion on Thrust Regulation of Gas Generator Cycle Rocket Engine

Applied Sciences

Thrust regulation is applied to maintain the performance of the liquid propellant rocket engine. ... more Thrust regulation is applied to maintain the performance of the liquid propellant rocket engine. The thrust level of a rocket engine can be readily controlled by adjusting the number of propellants introduced into the combustion chamber. In this study, a gas generator design is proposed in which thrust regulation is maintained by performing secondary combustion in the divergent section of the nozzle of a gas generator. Tangential and normal injection techniques have also been studied for better combustion analyses. A normal injection technique is used for the experiment and CFD results are validated with the experimental data. Chemical equilibrium analyses are also performed by minimizing Gibbs free energy with the steepest descent method augmented by the Nelder–Mead algorithm. These equilibrium calculations give the combustion species as obtained through the CFD results. Performance evaluation of the rocket engine, with and without secondary combustion in the gas generator, led to ...

Research paper thumbnail of Micro-Mechanical Investigation of Interfacial Debonding in Carbon Fiber-Reinforced Composites Using Extended Finite Element Method (XFEM) Approach

Micromachines

The interface debonding in carbon fiber-reinforced polymers is analyzed and evaluated using the e... more The interface debonding in carbon fiber-reinforced polymers is analyzed and evaluated using the extended finite element method (XFEM). In order to accurately evaluate the bonding properties between fibers and matrix, different tests were carried out, including the multiple tests for different orientations to study longitudinal, transversal, and shear properties of unidirectional carbon fiber-reinforced composites. Extensive experimentation has been performed in all the different groups and categories with different dimensions and parameters in order to ascertain the values of strength and the prediction of the damage to the structure. The experimental and numerical comparison provided significant trends and data to evaluate the mechanical properties of the interface. The values of stiffness and strength are compared and validated. Development of Representative Volume Element (RVE) for progressive damage model to these damage phenomena has already been performed as a feasibility stud...

Research paper thumbnail of Crashworthiness study of UCAV’s main landing gear using explicit dynamics

International Journal of Crashworthiness, 2022

Research paper thumbnail of Automatic Sorting, Counting and Bottle Filling Robotic Station

This project is aimed at automating the sorting and bottle filling. This project will automatical... more This project is aimed at automating the sorting and bottle filling. This project will automatically sort bottle according to their size by using IR sensors. Then it sorts the bottle on the designated portion of conveyor belt and passes it to the Solenoid Operated Valves to fill the bottles. The overall system is liberated from human intervention. The system is comprehensive and efficient, thus can help in automating the sorting, counting and bottle filling.

Research paper thumbnail of Stress Analysis for variable frequency Spline Shaft under Torsion

Research paper thumbnail of Design and Structural Analysis of Weight Optimized Main Landing Gears for UAV Under Impact Loading

Journal of Space Technology

Landing gears being the most critical part of an aircraft must be designed to withstand the worst... more Landing gears being the most critical part of an aircraft must be designed to withstand the worst scenario in a mission profile i.e., loading conditions. While in an unmanned aerial vehicles, weight optimization is one of the important concerns for Analysis. The structure is designed considering the values of stresses, strains/deformations and stress intensities using computational tools for the maximum values of loads, with a reasonable & logical safety factor. Keeping in view all the parameters, weight is optimized in a way such that an optimized structure for the landing gear can with stand deformations. Commercially available computational tools are used for the evaluation of initial structure design in Tri-cycle Model (Model-01) & modified model (Model-02). The models were used for computation of stresses, strains, stress intensities and finally a lightweight and reliable structure design is evolved.

Research paper thumbnail of Construction of Horizontal Axis Wind Turbines A beginners Approach

The most important component of a Wind Energy Converter is the rotor. The efficiency of a rotor i... more The most important component of a Wind Energy Converter is the rotor. The efficiency of a rotor is characterized by its profile (airfoil section) and the corresponding aerodynamic design. The NACA 4415 is selected as an aerofoil for the rotor due to its increased efficiency. A light with a good strength is used for the blades. The blade is carved at different blade angles.Alternator is made of two components, magnet rotor and stator. Magnet rotor is mild steel disk with magnets positioned on it using molding process. Stator is made of 9 coils. Each coil with 220 turns number of turns. The stator is sandwiched between the magnet rotors. With the rotary motion of magnet rotors, flux is generated and hence AC voltage is in the coil which is converted into DC voltage with the help of bridge rectifiers. The output in the form of DC volt is used to charge the battery. The furling system is used for rotating the turbine to the desired direction of the wind.

Research paper thumbnail of NOx Emission Prediction Analysis and Comparison in Gas Turbine Combustor Utilizing CFD and CRN Combined Approach

2019 Sixth International Conference on Aerospace Science and Engineering (ICASE), 2019

Prediction of Nitrous oxides (NOx) emission and development in combustion burning devices utilizi... more Prediction of Nitrous oxides (NOx) emission and development in combustion burning devices utilizing numerical simulation is significant now days because of strict legislation about environment impact of contaminated gases. This work managed consolidates approach of Computational Fluid Dynamics (CFD) and Chemical Reactor Networking (CRN) method to analyze the pollutant discharged NOx from gas turbine Ignition chamber. A 2D model was created of the gas turbine combustor utilizing design tool and CFD simulations were done by using FLUENT software and determined the data about the flow field, temperature, velocity insight the combustor by varying the equivalence ratios, using methane gas (CH4) as burning fuel. On the base of CFD data 2 CRN models were made, the first one depended on 5 PSR's CRN reactors which divided the combustor into 5 flame sections that named as primary CRN model and the second one was increased number of CRN reactors with 12 flame sections that contained 12 PSR...

Research paper thumbnail of CFD analysis on the effects of distorted inlet flows with variable RPM on the stability of the transonic micro-compressor

Research paper thumbnail of Response of piezoelectric materials on thermomechanical shocking and electrical shocking for aerospace applications

Research paper thumbnail of Piezoelectric thermo electromechanical energy harvester for reconnaissance satellite structure

Research paper thumbnail of Weight Optimized Main Landing Gears for UAV under Impact Loading for Evaluation of Explicit Dynamics Study

Research paper thumbnail of Weight Optimized Main Landing Gears for UAV under Impact Loading for Evaluation of Explicit Dynamics Study

Research paper thumbnail of Lec-01

• Now let us build the geometry in ANSYS. The strategy to create the desired geometry is by first... more • Now let us build the geometry in ANSYS. The strategy to create the desired geometry is by first creating the key points where the loads will be applied and then uniting these key points with lines.