Accession Number:

AD0466580

Title:

IMPROVED METHODS FOR DETERMINING SECOND-THROAT DIFFUSER PERFORMANCE OF ZERO-SECONDARY-FLOW EJECTOR SYSTEMS

Descriptive Note:

Corporate Author:

ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN

Personal Author(s):

Report Date:

1965-07-01

Pagination or Media Count:

68.0

Abstract:

Improved methods are presented for estimating the required starting pressure ratio of a given axisymmetric second-throat, ejector-diffuser system used in rocket altitude simulation. The improved theory involves a more accurate technique for determining ramp pressure. The new technique utilizes the flow field approaching the second throat along with two-dimensional oblique shock relations and the conservation equations to determine the conditions at the throat entrance. The results are applied to second-throat diffusers with throat lengths varying from 0.2 to 8.1 throat diameters and to second throats with a center-body located at various positions.

Subject Categories:

  • Machinery and Tools
  • Test Facilities, Equipment and Methods
  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE