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Shock loading predictions from application of indicial theory to shock-turbulence interactionsA sequence of steps that permits prediction of some of the characteristics of the pressure field beneath a fluctuating shock wave from knowledge of the oncoming turbulent boundary layer is presented. The theory first predicts the power spectrum and pdf of the position and velocity of the shock wave, which are then used to obtain the shock frequency distribution, and the pdf of the pressure field, as a function of position within the interaction region. To test the validity of the crucial assumption of linearity, the indicial response of a normal shock is calculated from numerical simulation. This indicial response, after being fit by a simple relaxation model, is used to predict the shock position and velocity spectra, along with the shock passage frequency distribution. The low frequency portion of the shock spectra, where most of the energy is concentrated, is satisfactorily predicted by this method.
Document ID
19910059016
Document Type
Conference Paper
Authors
Keefe, Laurence R. (Nielsen Engineering and Research, Inc. Mountain View, CA, United States)
Nixon, David (Nielsen Engineering and Research, Inc. Mountain View, CA, United States)
Date Acquired
August 15, 2013
Publication Date
June 1, 1991
Subject Category
AERODYNAMICS
Report/Patent Number
AIAA PAPER 91-1777
Funding Number(s)
CONTRACT_GRANT: NAS1-19027
Distribution Limits
Public
Copyright
Other