Plasma induced air flow on passenger car spoiler

Ab. Basir, Amirul Ayady (2021) Plasma induced air flow on passenger car spoiler. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The primary objective of the study presented in this report was to investigate the ability of Dielectric Barrier Discharge (DBD) plasma actuator in influencing aerodynamics characteristics of the vehicle spoiler. In aerodynamics flow control applications, the Barrier Discharge (DBD) plasma actuator has become a well-known tool for flow control devices to delay separation and augment lift on a wing. Because of its unique properties, the DBD plasma actuator has been employed in a variety of studies. Compared to other flow control systems, plasma actuators provide a number of advantages. Plasma actuators can be employed as an active flow control device in the first place. This implies they can be utilised just, when necessary, rather than being employed indefinitely and uncontrollably, as passive vortex generators are. Because the exposed electrode is often less than 0.1 mm thick, plasma actuators have essentially no effect on the flow while in the off position when properly integrated. Plasma actuators also have no moving parts, making them solid-state devices, which are much simpler than mechanical devices with moving parts from a mechanical standpoint. The used of DBD plasma actuator has been applied for any type of flow control such as on airfoil, flow control around cylinder or bluff body, deferring flow separation on turbine blades and improving aerodynamics performance especially in automotive industry. Next, inverted airfoil will be used as the design of spoiler. Hence, this study manages the improvement of aerodynamics performance on vehicle spoiler where the design is constructed from NACA 4412 airfoil. Then, DBD plasma actuator is attached and mounted on the upper part of the leading edge of the spoiler to allow the tools to delay the separation of flow that usually occurs at the leading edge of a body profile. Lift coefficient CL, drag coefficient CD and flow visualization were conducted on the case without the plasma using ANSYS FLUENT software. However, because of Covid-19, airfoil with plasma actuator also use ANSYS FLUENT but UDF was added into the case. A user-defined function, or UDF, is a function that you program that can be dynamically loaded with the ANSYS FLUENT solver to enhance the standard features of the code. The results obtained show that the Dielectric Barrier Discharge (DBD) plasma actuator is able to influencing aerodynamics characteristics of the vehicle spoiler. Hence it also can improve in downforce and flow detachment. In conclusion, the DBD plasma actuator has proven to be a viable alternative to mechanical devices, particularly in the automotive industry

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