EXPERIMENTS ON THE CONTROL OF PLANE JETS BY AUXILIARY FLOWS
CALIFORNIA UNIV LOS ANGELES
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The operation of certain types of fluid flow devices depends upon the character and response of jet flows to applied disturbances. In such devices it is typical for a power jet to be deflected by a laterally impinging control jet, either in a steady or dynamic regime. Two dimensional jet flows revelant to these devices are studied experimentally as a separate element, i.e., free from the effects of nearby solid boundaries. Steady deflection characteristics for several jet geometries are discussed and illustrated by photographs. For a single control jet system, flow measurements show a linear relationship between the momenta of the two interacting jets for constant angles of deflection. Analytical expressions which describe the deflection angle and resultant pressure forces in terms of the jet momenta are developed. For two symmetrically placed control jets, it is found that there exists a particular setback of the jet housings where control flow requirements are minimum. The problem of deflection past a wedge centered in the power jet stream is also considered.
- Military Aircraft Operations
- Fluid Mechanics