Velocity-coupled flow oscillations in a simulated solid-propellant rocket environmentA comprehensive numerical analysis has been carried out to study the unsteady flowfields in a simulated rocket-motor environment. The model is based on the time-dependent compressible Navier-Stokes equations with a two-equation turbulence closure scheme. Various important aspects of the coupling between acoustic oscillations and mean flowfields, including flow reversal, modification of transport properties, etc., are addressed. Results indicate that multi-dimensional effects play important roles in determining local flow structures and wave characteristics. In much of the domain, acoustic velocity nodal points are observed in the near-wall region. The classical one-dimensional theory fails to describe several important mechanisms associated with velocity-induced flow instabilities.
Document ID
19880040493
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Yang, Vigor (Pennsylvania State University University Park, United States)
Hsieh, Kwang-Chung (NASA Lewis Research Center; Sverdrup Technology, Inc. Cleveland, OH, United States)
Tseng, Jesse I. S. (Pennsylvania State Univ. University Park, PA, United States)