Author: Wong, Chung Chu
Title: Effect of nanosecond dielectric barrier discharge plasma actuators on shock wave boundary layer interaction
Advisors: Wen, Chih-yung (ME)
Degree: M.Sc.
Year: 2022
Subject: Plasma (Ionized gases)
Plasma engineering
Hong Kong Polytechnic University -- Dissertations
Department: Department of Mechanical Engineering
Pages: viii, 63 pages : color illustrations
Language: English
Abstract: Nanosecond Dielectric Barrier Discharge (NS-DBD) plasma flow active control is a field where was not fully explored and understood. The main advantages of the DBD plasma flow active control are lightweight, small size, simple design, low energy consumption, and zero reaction time. Those advantages allow DBD to become a high potential new system of flight control in the future.
In this dissertation, the characteristics of different material combinations of NSĀ­-DBD were investigated in the quiescence air. Parameters including overpressure, speed, and power consumption of NS-DBD were measured. After comparing all the material performance, the optimization material combination was use of polymethyl methacrylate (PMMA) dielectric with the copper electrode.
The effect of the NS-DBD plasma actuator on Shock Wave/Boundary Layer Interaction (SWBLI) was studied through the compression ramp with the supersonic flow. The experiment was conducted inside Ludwieg tube supersonic wind tunnel. The Mach number of the flow was Mach 4 and Reynolds number per unit meter was 7.91*10^6 /m. Schlieren Image of supersonic was captured by a high-speed camera for analysis of the change after NS-DBD activation.
Although the Schlieren Image could not show that the effect of the NS-DBD plasma actuator was significant for controlling SWBLI, the result inspired a new idea of the NS-DBD modification to increase the performance. Schlieren Image could only record the change of density. Another visualization method shall be used for studying the effect of the NS-DBD plasma actuator on SWBLI.
Rights: All rights reserved
Access: restricted access

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