A Diffuser Heat Transfer Code
Final rept. 1 Oct 1982-30 Sep 1983
AIR FORCE ROCKET PROPULSION LAB EDWARDS AFB CA
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A computer code for diffuser heat transfer analysis DHT has been developed which improves upon the earlier Rocket Engine Diffuser Thermal Analysis Program REDTAP of Trout and McCay. Improvements contained within DHT include provision for a radial temperature gradient within the diffuser wall, treatment of impingement heat transfer at the point of plume attachment, an improved model for the particle impingement accommodation coefficient, and a model for particle debris shielding. The 77-inch diffuser located at the Air Force Rocket Propulsion Laboratory was instrumented to record the water side diffuser wall temperature and water jacket temperature at selected sites along the initial seven feet of the diffuser during routine test firings. Comparison of the predictions of DHT and preliminary experimental data show promise but as of the present time inadequate experimental data exist to allow a validation of the code.
- Rocket Engines