Accession Number:

AD0429812

Title:

CORRELATION OF THE BASE-PRESSURE BEHIND A TWO DIMENSIONAL BACKWARD FACING STEP IN A LAMINAR SUPERSONIC FLOW,

Descriptive Note:

Corporate Author:

TECHNION - ISRAEL INST OF TECH HAIFA

Personal Author(s):

Report Date:

1962-12-01

Pagination or Media Count:

36.0

Abstract:

Pressure disribution over two-dimensional backward-facing step models is measured at Mach 2.25 and 3.55. The Reynolds numbers based on flat plate length L in these tests vary between 0.5x10 to the fifth power and 5x10 to the fifth power. In the laminar flow case, the base pressure was found to correlate with the single para meter delta X sub shL in accordance with the base flow theory which is based on the CroccoLees mixing concepts. The mixing parameter C is found to be approximately 15 when the mixing region thickness is defined at uu sub e 0.95. This value for C agrees with the mixing parameter value found in the shock wave-laminar boundary layer case by Glick. This result supports the a priori assumption of the mixing theory that the mixing parameter C be independent of external flow Mach number and Reynolds number. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE