UCDS Based Stable Injector Design

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$599,710.00
Award Year:
2011
Program:
SBIR
Phase:
Phase II
Contract:
NNX11CA73C
Award Id:
n/a
Agency Tracking Number:
094072
Solicitation Year:
2009
Solicitation Topic Code:
X10.01
Solicitation Number:
n/a
Small Business Information
TN, Tullahoma, TN, 37388-5583
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
144158677
Principal Investigator:
Paul Gloyer
Principal Investigator
(931) 393-5108
paul.gloyer@gtlcompany.com
Business Contact:
Paul Gloyer
Business Official
(931) 393-5108
paul.gloyer@gtlcompany.com
Research Institution:
Stub




Abstract
History has repeatedly shown that combustion instability is the greatest technical risk faced in any chemical propulsion development program. The UCDS Process addresses this issue by using a rigorous physics-based analytical framework to decompose the complex flow field inside a chemical propulsion device, such as a liquid or solid rocket, in a way that allows rapid simulation of the dynamic behavior. Using UCDS it is possible to generate high fidelity predictions of the time evolution, amplitude and waveform of a pressure oscillation, along with any changes to the mean properties due to non-linear effects. Furthermore, it has been shown that the modal Alpha (linear growth rate) is a key physical parameter that defines the dynamic behavior of a rocket and provides a reliable measure of combustion stability margin.By monitoring how the array of modal Alphas change with design or operational features, the effects on engine combustion stability can be predicted. This insight provides the means to eliminate instability without resorting to expensive cut-and-try iterative developmental testing. GTL proposes to use this design guideline and the UCDS<SUP>TM</SUP>Process to create a clean-sheet design for a new liquid rocket that is inherently stable and compare it to an existing engine.

* information listed above is at the time of submission.

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