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Effect of Flow Misalignment and Multi-Hole Interaction on Boundary-Layer Bleed Hole Flow Coefficient Behavior

Author
Davis, David O.
Published
Jun. 1997.
Physical Description
1 electronic document
Additional Creators
Schoenenberger, Mark and Grimes, Marcus
Online Version

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Summary
The effect of flow misalignment on the flow coefficient behavior of a 20 deg. boundary-layer bleed hole and the effect of the interaction between two 90 deg. bleed holes separated by two hole diameters on flow coefficient behavior has been studied experimentally. Both tests were run at freestream Mach numbers of 0.61, 1.62 and 2.49. The flow misalignment study was conducted over a range of 0 to 30 deg. The results show that neither flow misalignment nor hole interaction has much effect on the flow coefficient for the subsonic case. For the supersonic cases, flow misalignment causes significant degradation in the performance of the slant hole. For the supersonic normal hole interaction cases, depending on the hole orientation, either an increase or decrease in overall flow coefficient was observed. The largest change in flow coefficient, 6% increase at near choke conditions, occurred when the holes were oriented in line with the flow direction.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19970025061.
Accession ID: 97N24713.
NAS 1.15:107480.
E-10768.
NASA-TM-107480.
Mechanical Engineeringm Congress and Exhibit; 17-22 Nov. 1996; Atlanta, GA; United States.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15647671