Passive Control of Supersonic Cavity Flowfields 912153

A computational investigation has been conducted to study the effect and mechanisms of the passive control of a supersonic flow over a rectangular two-dimensional cavity. The passive control was included through the use of a porous surface over a vent chamber in the floor of the cavity.
The passive control effectively suppressed the low-frequency pressure oscillations for the open type cavity, (length-to-depth ratio = 6.0). The mechanism for the suppression was observed to be the stabilization of the motion of the free shear layer. For the closed type cavity flow, (length-to-depth ratio = 17.5), the passive control modified the flow field to nearly that of an open type cavity flow; further the cavity drag was reduced by a factor of 4. The computational results of both cases showed good agreement with the available experimental data and the predictions of a semi-empirical formula.
This study demonstrates that the passive control concept can be used to improve the aerodynamic characteristics of open and closed cavity flow fields.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 40% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.