Advanced Liquid Surface Tracking Software for Predicting Atomization in Gas Turbine Combustors and Augmentors

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-08-C-0393
Agency Tracking Number: N071-046-1084
Amount: $929,559.00
Phase: Phase II
Program: SBIR
Awards Year: 2008
Solicitation Year: 2007
Solicitation Topic Code: N07-046
Solicitation Number: 2007.1
Small Business Information
1330 Charleston Road, Mountain View, CA, 94043
DUNS: 179576715
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Shoreh Hajiloo
 General Manager
 (650) 691-6067
 hajiloo@turbulentflow.com
Business Contact
 Paviz Moin
Title: President
Phone: (650) 224-4882
Email: moin@turbulentflow.com
Research Institution
N/A
Abstract
The atomization of liquid fuels is a key process in gas turbine engines and augmentors, directly influencing combustion and thus engine performance. While adequate models exist for the secondary atomization, the crucial initial breakup is not well understood and predictive numerical simulation tools to analyze the process in detail do not exist. In this project, we propose to apply the recently developed Refined Level Set Grid (RLSG) to the primary atomization problem. This method, in a detached code, resolves and tracks all relevant phase interface length scales on a separate, locally refined grid. The RLSG code is coupled to the flow solver via a multi-code coupling environment, thereby ensuring easy portability and expandability. The resulting software package has been successfully applied to several two-phase flow benchmarks. In the project’s initial phase, we have accessed the capability of the proposed software framework to predict the atomization of liquid jets in cross-flow under conditions relevant to gas turbines. In the next phase, the capability will be enhanced to include more complicated atomizer geometries as well as evaporation and phase change relevant to operating conditions of augmentors In conjunction with leading military engine manufacture, and by using relevant experimental data in the near- and far-field, the codes and the methodology will be validated. Another possible outcome of the proposed work is derivation of appropriate sub-grid models in the context of Large Eddy Simulation of primary atomization.

* Information listed above is at the time of submission. *

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