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http://dx.doi.org/10.5407/JKSV.2010.8.3.056

Experimental and Computational Studies of FSS-RSS Phenomena in an Over-Expanded Nozzle  

Lee, Jong-Sung (안동대학교 기계공학과)
Kim, Heuy-Dong (안동대학교 기계공학과)
Publication Information
Journal of the Korean Society of Visualization / v.8, no.3, 2010 , pp. 56-62 More about this Journal
Abstract
The interaction patterns between shock wave and boundary layer in a rocket nozzle are mainly classified into two categories, FSS(Free Shock Separation) and RSS(Restricted Shock Separation), both of which are associated with the thrust characteristics as well as side loads of the engine. According to the previous investigations, strong side loads of the engine are produced during the period of transition from FSS to RSS or vice versa. The present work aims at investigating the unsteady behavior of the separation shock waves in a two-dimensional supersonic nozzle, using experimental method and CFD. Schlieren optical method was employed to visualize the time-mean and time-dependent shock motions in the nozzle. The unsteady, compressible N-S equations with SST K-$\omega$ turbulence closure were solved using a fully implicit finite volume scheme. The results obtained show the separation shock motions during the transition of the interaction pattern.
Keywords
Compressible flow; Over-expanded fow; FSS; RSS; Side-Load; Shock wave and boundary layer interaction;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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