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http://dx.doi.org/10.3795/KSME-B.2017.41.7.489

Experimental Study on the Supersonic Jets at Low Operating Pressure Ratio  

Lee, Jae Hyeok (Dept. of Mechanical Engineering, Andong Nat'l Univ.)
Zhang, Guang (Dept. of Mechanical Engineering, Andong Nat'l Univ.)
Kim, Tae Ho (Dept. of Mechanical Engineering, Andong Nat'l Univ.)
Kim, Heuy Dong (Dept. of Mechanical Engineering, Andong Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.41, no.7, 2017 , pp. 489-495 More about this Journal
Abstract
An experimental study on supersonic jets produced by supersonic nozzles at low operating pressure ratio is conducted. In the present experiments, particle image velocimetry (PIV) was employed to quantitatively specify the jet flowfield, and a color Schlieren optical method was applied to observe the same jets qualitatively. Convergent-divergent nozzles were used to generate the jet flow with design Mach numbers of 1.5 and 1.8. Nozzle pressure ratios (NPRs) were varied from 4 to 7. A good comparison of the jet size from the Schlieren images with the theoretical values is obtained. The obtained images clearly showed the major features of the under-expanded jet and over-expanded jet.
Keywords
Particle Image Velocimetry(PIV)Rainbow Schlieren; Compressible Flow; Shock Wave; Over-expanded Jet; Under-expanded Jet;
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