Accession Number:

ADA478590

Title:

Experimental Study of Cavity-Strut Combustion in Supersonic Flow (Postprint)

Descriptive Note:

Conference paper, 30 Apr 2004-1 Jun 2007

Corporate Author:

INNOVATIVE SCIENTIFIC SOLUTIONS INC DAYTON OH

Report Date:

2007-07-01

Pagination or Media Count:

16.0

Abstract:

An experimental investigation of cavity-based flameholders with strut injectors in a supersonic flow is reported. In this ongoing research program, emphases are placed on understanding cavity-based flameholders and providing alternative methods for improving overall combustor performance in scramjet engines. Three different struts with fuel injectors are mounted near the cavity leading edge to study flame propagation and ignition of fuel in the core flow region. OH-PLIF is used to identify the flame zone around the cavity and strut-wake regions over a range of conditions. Shadowgraphy is used to capture the flow features around the strut and cavity. In-stream probing is conducted to characterize the flow features associated with the different strut configurations. Stagnation-temperature profiles are obtained for all struts operating over the same conditions in the combusting-flow study. Two cavity fueling schemes are used to compare flameholder performance. Direct cavity air injection is found to improve combustion significantly. For each strut, upstream and downstream fueling schemes are compared over a range of conditions.

Subject Categories:

  • Fluid Mechanics
  • Combustion and Ignition
  • Jet and Gas Turbine Engines
  • Reciprocating and Rotating Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE