Isolator-combustor interaction in a dual-mode scramjet engineA constant-area diffuser, or 'isolator', is required in both the ramjet and scramjet operating regimes of a dual-mode engine configuration in order to prevent unstarts due to pressure feedback from the combustor. Because the nature of the combustor-isolator interaction is different in the two operational modes, however, attention is presently given to the use of thermal vs kinetic energy coordinates for these interaction processes' visualization. The results of the analysis thus conducted indicate that the isolator requires severe flow separation at combustor entry, and that its entropy-generating characteristics are more severe than an equivalent oblique shock. A constant-area diffuser is only marginally able to contain the equivalent normal shock required for subsonic combustor entry.
Document ID
19930039044
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Pratt, David T. (Washington Univ. Seattle, United States)
Heiser, William H. (Tennessee Univ. Tullahoma, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
AIAA PAPER 93-0358
Meeting Information
Meeting: AIAA, Aerospace Sciences Meeting and Exhibit