USA flag logo/image

An Official Website of the United States Government

VENTED NOZZLE CONCEPT FOR OPTIMUM PERFORMANCE OF LAUNCH VEHICLES

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
10411
Program Year/Program:
1989 / SBIR
Agency Tracking Number:
10411
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
CFD Research Corporation
215 Wynn Dr., 5th Floor Huntsville, AL 35805-
View profile »
Woman-Owned: Yes
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1989
Title: VENTED NOZZLE CONCEPT FOR OPTIMUM PERFORMANCE OF LAUNCH VEHICLES
Agency: NASA
Contract: N/A
Award Amount: $50,000.00
 

Abstract:

THE VENTED NOZZLE IS AN INNOVATIVE CONCEPT TO AERODYNAMICALLY MODULATE THE NOZZLE FLOW AREA DURING FLIGHT OF A LAUNCH VEHICLE AND THUS GREATLY IMPROVE THE NOZZLE PERFORMANCE. IT REQUIRES A LARGE AREA RATIO NOZZLE WHOSE WALLS ARE VENTED THROUGH A SERIES OF SPRINGLOADED CHECK VALVES. THIS ALLOWS CONTINUOUS AND PASSIVE ADJUSTMENT OF EXHAUST TO AMBIENT PRESSURES AND ALSO REDUCES THE TRANSIENT START LOADS ON THE NOZZLE. IN PHASE I OF THIS PROJECT, AN EXISTING CFD CODE WILL BE USED TO EXAMINE THE FEASIBILITY OFTHE BASIC CONCEPT. A SPACECRAFT NOZZLE, SUCH AS THE SSME NOZZLE, WILL BE ANALYZED WITH SEVERAL VENT CONFIGURATIONS. BASIC PERFORMANCE PARAMETERS AND FLOW DISTRIBUTIONS WILL BE STUDIED FOR SEVERAL PRESSURE RATIOS TO SIMULATE OPERATION ATVARIOUS ALTITUDES. EFFECTS OF FLOW PROTRUSIONS, INTRODUCED UPSTREAM OF CHECK VALVES TO ENHANCE THE RELIABILITY OF THEIR OPERATION, WILL ALSO BE ANALYZED. IN PHASE II, OPERATIONAL QUESTIONS SUCH AS SIDE LOADS DUE TO FAILED VALVES WILL BE ANALYZED AND AN OPTIMUM NOZZLE DESIGN WILL BEDEVELOPED AND TESTED. THE ADAPTED CFD CODE WILL ALSO SERVE AS A VALUABLE DESIGN TOOL.

Principal Investigator:

Dr Andrzej J Przekwas
0

Business Contact:

Small Business Information at Submission:

Cfd Research Corp
3313 Bob Wallace Ave #205 Huntsville, AL 35805

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No