Engineering model of unsteady flow in a cavity
Abstract
A mathematical model was assembled from fundamental fluid dynamic relations and turbulent singlestream mixing zone relations to predict spectra, i.e., the frequency and amplitude, of unsteady pressures acting in a rectangular cavity exposed to an external flow parallel to the cavity opening. Characteristics of the approaching boundary layer are expected as inputs, thereby allowing computation of spectra for cases of massinjection upstream of the cavity. The equations were compiled as a code (CAP) that can be run in less that 15 sec on a personal computer. Maximum dynamic loads acting on the contents of the cavity can be estimated, in addition to the primary frequencies of oscillation.
 Publication:

Final Report
 Pub Date:
 December 1991
 Bibcode:
 1991aedc.rept.....B
 Keywords:

 Cavities;
 Dynamic Loads;
 Mathematical Models;
 Oscillating Flow;
 Pressure Distribution;
 Unsteady Flow;
 Boundary Layer Equations;
 Computational Fluid Dynamics;
 Flow Equations;
 Mixing Layers (Fluids);
 Spectra;
 Fluid Mechanics and Heat Transfer