Improving Off-Design Nozzle Performance Using Fluidic Injection

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$69,996.00
Award Year:
2003
Program:
SBIR
Phase:
Phase I
Contract:
NAS3-03031
Award Id:
62114
Agency Tracking Number:
023641
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
880 Jupiter Park Dr. #8, Jupiter, FL, 33458
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Eric Gamble
(561) 741-3441
egamble@spiritech.cc
Business Contact:
Richard DeFrancesco
Business Official
(561) 741-3441
defran@spiritech.cc
Research Institution:
n/a
Abstract
Use of fluidic injection of high-pressure air is proposed to improve nozzle performance and reduce the off-axis component of thrust at off-design flight conditions, generally at low Mach number and low pressure ratio. Hypersonic flight vehicles are typically designed with a high expansion ratio single expansion ramp nozzle (SERN) with a design point at high Mach number flight conditions. However, at low Mach number flight, lower nozzle expansion ratios are required for optimum performance. Thus, these vehicles suffer from poor performance throughout much of the low-speed flight regime. In addition, the long SERN ramp creates a significant off-axis thrust at off-design, which must be overcome by shifting the vehicle center-of-gravity or by using the vehicle?s control surfaces. This concept manages the engine and freestream flows to alleviate these problems and improve the overall vehicle performance. The Phase I effort will focus on employing 1-D and CFD analyses to prove concept feasibility and to define the injectant pressure and flow requirements. The Phase II program will focus on a preliminary design, including integration issues, design of the secondary valve and injection features, and component testing to verify overall performance gains.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government