Abstract
This experiment investigates flowfield characteristics, shock structure, and pressure fluctuation of a supersonic impinging jet for various nozzle to plate distances and nozzle pressure ratios (NPRs). The plate distances analyzed were 10 mm, 20 mm, and 30 mm and the NPRs investigated were 2.77, 3.72, and 4.81. The Schlieren imaging technique was used to observe the shock structure of the impinging jet system. Pressure transducers were used in order to analyze the frequencies of pressure fluctuation generated by the shock propagation of the impinging jet and determine the effects of each independent variable and their interactions. Particle Image Velocimetry (PIV) measurements were performed at the central plane of the nozzle near the impingement surface. From PIV measurements, velocity vector fields, flow characteristics, mean velocity, Turbulent Kinetic Energy, and Reynolds stress profiles were computed. Good agreement was observed between both the Schlieren imaging and PIV techniques. The Schlieren imaging and pressure measurements were useful in studying and understanding the shock structure and its potential effects.
| Original language | English |
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| Title of host publication | AIAA AVIATION 2020 FORUM |
| Publisher | American Institute of Aeronautics and Astronautics Inc, AIAA |
| ISBN (Print) | 9781624105982 |
| DOIs | |
| State | Published - 2020 |
| Externally published | Yes |
| Event | AIAA AVIATION 2020 FORUM - Virtual, Online Duration: Jun 15 2020 → Jun 19 2020 |
Publication series
| Name | AIAA AVIATION 2020 FORUM |
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Conference
| Conference | AIAA AVIATION 2020 FORUM |
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| City | Virtual, Online |
| Period | 06/15/20 → 06/19/20 |
Funding
The authors would like to thank the US Department of Energy, Idaho National Laboratory, and Sandia National Laboratory, and Institute of Applied Energy (Japan) for their support.