Isam Yousif | NORTHERN TECHNICAL COLLEGE (original) (raw)

Papers by Isam Yousif

Materials Science Forum, 2021

In this paper, the effect of laser surface heat treatment on wear resistance and hardness of an a... more In this paper, the effect of laser surface heat treatment on wear resistance and hardness of an aluminum alloy Al-6061 as a base material with different ratios of SiC particles as an additive was studied. The composite material was prepared from Al-6061 aluminum alloy and particles with a granular size of (10-70) μm with different weight ratios (15%, 12%, 9%, 6%, 3%), where the stirred plumbing technique was used to ensure An increase in the wettability of SiC particles in the base alloy fuse and the possibility of distributing it uniformly. The laser surface heat treatment of the composite material prepared using the Neodymium - YAG laser was performed with a power of 1J, a wavelength of 1.06 μm, a pulse time of 5 m sec, and a distance of 30 cm between the exit area of the laser from the system and the piece to be thermally treated. The results showed an improvement in the mechanical properties of the prepared composite material (hardness, wear resistance) after performing the surf...

International Journal of Mechanical Engineering and Robotics Research

The paper aims to study the thermal stresses on an exhaust valve body with and without using the ... more The paper aims to study the thermal stresses on an exhaust valve body with and without using the Thermal Barrier Coating technique (TBC) in the valve face region. A 2-dimensional model is created for the numerical analysis. The work is carried out with the aid of the ANSYS-APDL package. The procedure of the numerical analysis is divided into two processes. The first process is the thermal analysis to obtain the temperature values, which are set up as thermal loads for the structural analysis in the second process. The coating of the valve is carried out through three steps of analysis by selecting a single layer of TBC, a double layer of TBC, and a triple layer of TBC. Three types of TBC materials are taken in this work, which are SiO2, Al2O3, and ZrO2. The location of TBC type for the double and triple cases is taken into consideration, in the steps of analysis of double and triple design of exhaust vale coating is done by changing of the material type of TBC which it is on the upper or lower concerning the valve face. The results showed that using the SiO2 material as a TBC in the case of single, double, and triple coating of the exhaust valve face gives a low value of thermal deformations and thermal stresses. The stresses in steel alloy in cases without and with TBCs as compared to titanium valve showed a good reduction in thermal stresses for the titanium aluminide exhaust valve.

APPLIED PHYSICS OF CONDENSED MATTER (APCOM 2019)

Rising demand for energy due to industrial development has led to the depletion of fossil fuels, ... more Rising demand for energy due to industrial development has led to the depletion of fossil fuels, which adversely affect climate change due to fossil fuel emissions. Wind energy is one of the most available popular sources of renewable energy are rapid growth. At the present vertical axis wind turbine (VAWT) is one of the kind of machines that used to produce electricity. The aerodynamics of a VAWT are very complex due to the dynamic stall when the blade of the turbine is an airfoil. Low starting torque is the wind turbine disadvantage when the airfoil is used as a blade. A computational fluid dynamic CFD is used to simulate the aerodynamic characteristics of the current model (coupling of the three blades VAWT with a movable vane). (SST) k-ω turbulence and finite volume method were used to solve the aerodynamics of the flow around the current model by using ANSYS FLUENT 16.1 software's. The finding results from the numerical simulation show that the drag coefficient (Cd), static pressure drop and starting torque are increased in the positive side and decreases in the negative side of the turbine rotor. The movable vanes which are coupled with airfoil for each blade help the coming airflow passing freely between the vanes at the negative blade position in case of all the vanes are totally open, at this case the resistance coming from the air in the airflow direction is reduced to becoming near zero. Reducing the airflow resistance in the negative side of the turbine blades help to increase the rotation of the turbine rotor, then the output power from the turbine increases.

IOP Conference Series: Materials Science and Engineering

With the depletion of fossil fuels and the effects of fossil fuel emissions on climate change. Th... more With the depletion of fossil fuels and the effects of fossil fuel emissions on climate change. The demands of the renewable energy is increasing. For these reasons, many researchers they are focused on harvesting renewable energy and reducing the use of fossil fuels. The vertical axis wind turbine (VAWT) is one type of the wind turbine that is widely used now a day. Low starting torque occurs when the airfoil is used in the straight blade vertical axis wind turbine as a blade. In order to increase the turbine starting torque, a flat plate vane type VAWT having movable vane is integrated with the airfoil straight blade VAWT in one rotor combination. In the present study, the numerical simulation is carried out to predict the aerodynamic characteristics of the combined three blades vertical axis wind turbine. A commercial available SolidWork2016 and computational fluid dynamic (fluent) software's with k-ω turbulence mode are used in this simulation. The predicted results from the simulation show that the turbine starting torque is increased when the vertical movable vanes are integrated with the straight blade in the vertical axis wind turbine. The flow of air passes freely through the movable vanes in case of the vanes are fully open at the negative side of the turbine, this case helps to increase turbine rotation and so, thus, the power of the turbine increases. Finally, the predicted results from the simulation give a good agreement with those results reported in the published literature for VAWT has different blade configurations.

Materials Science Forum, 2021

In this paper, the effect of laser surface heat treatment on wear resistance and hardness of an a... more In this paper, the effect of laser surface heat treatment on wear resistance and hardness of an aluminum alloy Al-6061 as a base material with different ratios of SiC particles as an additive was studied. The composite material was prepared from Al-6061 aluminum alloy and particles with a granular size of (10-70) μm with different weight ratios (15%, 12%, 9%, 6%, 3%), where the stirred plumbing technique was used to ensure An increase in the wettability of SiC particles in the base alloy fuse and the possibility of distributing it uniformly. The laser surface heat treatment of the composite material prepared using the Neodymium - YAG laser was performed with a power of 1J, a wavelength of 1.06 μm, a pulse time of 5 m sec, and a distance of 30 cm between the exit area of the laser from the system and the piece to be thermally treated. The results showed an improvement in the mechanical properties of the prepared composite material (hardness, wear resistance) after performing the surf...

International Journal of Mechanical Engineering and Robotics Research

The paper aims to study the thermal stresses on an exhaust valve body with and without using the ... more The paper aims to study the thermal stresses on an exhaust valve body with and without using the Thermal Barrier Coating technique (TBC) in the valve face region. A 2-dimensional model is created for the numerical analysis. The work is carried out with the aid of the ANSYS-APDL package. The procedure of the numerical analysis is divided into two processes. The first process is the thermal analysis to obtain the temperature values, which are set up as thermal loads for the structural analysis in the second process. The coating of the valve is carried out through three steps of analysis by selecting a single layer of TBC, a double layer of TBC, and a triple layer of TBC. Three types of TBC materials are taken in this work, which are SiO2, Al2O3, and ZrO2. The location of TBC type for the double and triple cases is taken into consideration, in the steps of analysis of double and triple design of exhaust vale coating is done by changing of the material type of TBC which it is on the upper or lower concerning the valve face. The results showed that using the SiO2 material as a TBC in the case of single, double, and triple coating of the exhaust valve face gives a low value of thermal deformations and thermal stresses. The stresses in steel alloy in cases without and with TBCs as compared to titanium valve showed a good reduction in thermal stresses for the titanium aluminide exhaust valve.

APPLIED PHYSICS OF CONDENSED MATTER (APCOM 2019)

Rising demand for energy due to industrial development has led to the depletion of fossil fuels, ... more Rising demand for energy due to industrial development has led to the depletion of fossil fuels, which adversely affect climate change due to fossil fuel emissions. Wind energy is one of the most available popular sources of renewable energy are rapid growth. At the present vertical axis wind turbine (VAWT) is one of the kind of machines that used to produce electricity. The aerodynamics of a VAWT are very complex due to the dynamic stall when the blade of the turbine is an airfoil. Low starting torque is the wind turbine disadvantage when the airfoil is used as a blade. A computational fluid dynamic CFD is used to simulate the aerodynamic characteristics of the current model (coupling of the three blades VAWT with a movable vane). (SST) k-ω turbulence and finite volume method were used to solve the aerodynamics of the flow around the current model by using ANSYS FLUENT 16.1 software's. The finding results from the numerical simulation show that the drag coefficient (Cd), static pressure drop and starting torque are increased in the positive side and decreases in the negative side of the turbine rotor. The movable vanes which are coupled with airfoil for each blade help the coming airflow passing freely between the vanes at the negative blade position in case of all the vanes are totally open, at this case the resistance coming from the air in the airflow direction is reduced to becoming near zero. Reducing the airflow resistance in the negative side of the turbine blades help to increase the rotation of the turbine rotor, then the output power from the turbine increases.

IOP Conference Series: Materials Science and Engineering

With the depletion of fossil fuels and the effects of fossil fuel emissions on climate change. Th... more With the depletion of fossil fuels and the effects of fossil fuel emissions on climate change. The demands of the renewable energy is increasing. For these reasons, many researchers they are focused on harvesting renewable energy and reducing the use of fossil fuels. The vertical axis wind turbine (VAWT) is one type of the wind turbine that is widely used now a day. Low starting torque occurs when the airfoil is used in the straight blade vertical axis wind turbine as a blade. In order to increase the turbine starting torque, a flat plate vane type VAWT having movable vane is integrated with the airfoil straight blade VAWT in one rotor combination. In the present study, the numerical simulation is carried out to predict the aerodynamic characteristics of the combined three blades vertical axis wind turbine. A commercial available SolidWork2016 and computational fluid dynamic (fluent) software's with k-ω turbulence mode are used in this simulation. The predicted results from the simulation show that the turbine starting torque is increased when the vertical movable vanes are integrated with the straight blade in the vertical axis wind turbine. The flow of air passes freely through the movable vanes in case of the vanes are fully open at the negative side of the turbine, this case helps to increase turbine rotation and so, thus, the power of the turbine increases. Finally, the predicted results from the simulation give a good agreement with those results reported in the published literature for VAWT has different blade configurations.