Accession Number : ADA231342


Title :   Boundary Layer Study. Experimental Validation Test Plan. Phase 4


Descriptive Note : Final rept. Jul 1986-Feb 1990


Corporate Author : SOFTWARE AND ENGINEERING ASSOCIATES INCCARSON CITY NV


Personal Author(s) : Kehtarnavaz, H ; Coats, D E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a231342.pdf


Report Date : Nov 1990


Pagination or Media Count : 158


Abstract : The trend towards very large area ratio nozzles, which result in performance gains for space propulsion applications, has increased the need for detailed knowledge of the momentum losses due to nozzle viscous effects (i.e., boundary layer). These losses degrade overall system performance, such as increasing system weight, decreasing useful payload weight, and/or decreasing effective system range. Another important factor in designing propulsive nozzles is the detailed knowledge of heat transfer at the wall for regeneratively cooled walls and/or material performance. Phase 4 (described in this report) consists of preparing an experimental test plan, which, if executed, would validate computational techniques used in evaluating propulsion performance losses due to boundary layers in rocket nozzles. The importance of the loss and the basis for the experimental work are established. Experimental techniques are also reviewed. Visits to numerous experimental facilities are described along with recommendations from these facilities. Finally, recommendations as to the diagnostic techniques of choice are made.


Descriptors :   *BOUNDARY LAYER , TEST AND EVALUATION , HEAT TRANSFER , EXPERIMENTAL DATA , SPACE TECHNOLOGY , PAYLOAD , COMPUTATIONS , VALIDATION , MATERIALS , EXPERIMENTAL DESIGN , TEST METHODS , RESEARCH FACILITIES , COOLING , PROPULSION SYSTEMS , PLANNING , WEIGHT , NOZZLES , DIAGNOSIS(GENERAL) , WALLS , LOSSES , VISCOSITY , MOMENTUM , ROCKET NOZZLES , SPACE PROPULSION


Subject Categories : Test Facilities, Equipment and Methods
      Fluid Mechanics
      Rocket Engines


Distribution Statement : APPROVED FOR PUBLIC RELEASE