The influence of the thermal wake due to pulsating optical discharge on the aerodynamic-drag force
| Autor: | T. A. Kiseleva, V. I. Yakovlev, A. A. Golyshev, Anatolii M Orishich |
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| Rok vydání: | 2018 |
| Předmět: |
Pulse repetition frequency
Nuclear and High Energy Physics Jet (fluid) Radiation Materials science Airflow 02 engineering and technology Aerodynamics Mechanics Wake 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics symbols.namesake 020303 mechanical engineering & transports 0203 mechanical engineering Mach number 0103 physical sciences Aerodynamic drag symbols Supersonic speed Astrophysics::Earth and Planetary Astrophysics |
| Zdroj: | Thermophysics and Aeromechanics. 25:257-264 |
| ISSN: | 1531-8699 0869-8643 |
| DOI: | 10.1134/s0869864318020117 |
| Popis: | The influence of a thermal wake due to gas injection and due to a pulsating optical discharge (POD) on the aero-dynamic-drag force of a body in a supersonic air flow with Mach number M = 1.45 are experimentally examined. With the help of a single-component aerodynamic balance, the influence of the injected subsonic jet and the thermal wake produced by POD on the aerodynamic drag of a hemisphere-on-cylinder model was studied. It is shown that the observed aerodynamic-force reduction phenomenon can be made more pronounced by increasing the laser power and pulse repetition frequency, or by decreasing the distance between the model and the pulsating optical discharge. The maximum aerodynamic-force reduction (up to 15%) due to the thermal-wake action was observed at a maximum laser-radiation power of W = 2.3 kW and at a pulse rate of f = 90 kHz. The joint effect due to the argon jet and due to the POD caused an aerodynamic-drag force reduction reaching 30%. |
| Databáze: | OpenAIRE |
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