Accession Number:

ADA162436

Title:

A Diffuser Heat Transfer and Erosion Code

Descriptive Note:

Final rept. Oct 1983-Jul 1985

Corporate Author:

AIR FORCE ROCKET PROPULSION LAB EDWARDS AFB CA

Personal Author(s):

Report Date:

1985-10-01

Pagination or Media Count:

53.0

Abstract:

A computer code for diffuser heat transfer and erosion analysis DHTE has been developed which improves upon the earlier Rocket Engine Diffuser Thermal Analysis Program REDTAP. Improvements contained within DHTE include provision for a radial temperature gradient within the diffuser wall, an improved model for the particle impingement accommodation coefficient, a model for particle debris shielding, and a model for wall erosion by particle impact. DHTE differs from an earlier diffuser heat transfer code DHT to the extent that it incorporates a simple erosion model and utilizes a more recent diffuser version of the JANNAF Standardized Plume Flow Field Model SCP2ND. The 77-inch diffuser was instrumented to record the water side wall temperature and water jacket temperature at selected sites along the initial seven feet of the diffuser during routine test firings. Data is presented that supports the predictions of DHTE but is inadequate to validate the code.

Subject Categories:

  • Computer Programming and Software
  • Thermodynamics
  • Rocket Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE