Numerical simulation of vectoring of arc plasma jet using Coanda effect
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Fluidic thrust-vectoring (FTV) is a novel technology developed to control the direction of thrust without using conventional moving surfaces. The tangential secondary flow strengthened the Coanda effect [1]. In order to achieve higher specific impulses and exit velocities than chemical thrusters, electric arc plasma jets. Due to the high temperatures associated with plasma near the nozzles, mechanical vectoring methods are not feasible and also provide more effective flow control [2]. Co-flow thrust vectoring is an alternative to flow control methods of vectoring, that modify the flow trajectory. We examine some variables such as Coanda surface radius and secondary flow height. Figure 1 shows the velocity contours of the DC arc plasma jet for 500 A and primary jet deflection using the Coanda effect and secondary. When the radius of the Coanda surface increases, the primary jet deflection angle increases. However, with the increase in the height of the secondary flow, the deflection angle of the primary jet decreases. Because of the increase in the height of the secondary flow in the constant mass flow, the momentum of the secondary flow decreases and it does not have enough energy to deflect the primary jet. Overall increasing the secondary mass flow ratio geometry leads to an increase in the angle of the thrust vector.
