Accession Number:

ADA449915

Title:

High Gravity (g) Combustion

Descriptive Note:

Final rept. 10 Feb 1999-28 Feb 2006

Corporate Author:

AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE

Personal Author(s):

Report Date:

2006-02-01

Pagination or Media Count:

25.0

Abstract:

Ultra-short combustors to minimize residence time, with special flame-holding mechanisms to cope with increased through-velocities are likely in the future. The Ultra-Compact Combustor UCC, a novel design based on trapped-vortex combustor TVC work that uses high swirl in a circumferential cavity to enhance reaction rates via high cavity g-loading on the order of 3000 gs. Increase in reaction rates translates to a reduced combustor volume. Three combustor geometric features were varied during experiments 1 high-g cavity flame-holding method, 2 high-g cavity to main airflow transport method, and 3 fuel injection method. Results have shown promise for advanced engine applications. Lean blowout fuel-air ratio limits at 25-50 the value of current systems were demonstrated. Combustion efficiency was measured over a wide range of UCC operating conditions. This data begins to build the design space required for future engine designs that may use these novel, compact, high-g combustion systems.

Subject Categories:

  • Combustion and Ignition
  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE