The U.S. Air Force Research Laboratory (AFRL) awarded Pratt & Whitney Rocketdyne a $1.35 million contract to develop improved computational tools to better predict combustion stability of hydrocarbon-fueled liquid rocket engines. The Advanced Liquid Rocket Engine Stability Technology - High Fidelity Model (ALREST-HFM) will be designed to improve the prediction of combustion instability using a combination of advanced algorithms and CFD. P&WR will team with Georgia Institute of Technology, which will provide computational code for the software; and HyPerComp Inc., a company that specializes in the research and development of computational tools for electromagnets, fluid mechanics, combustion, and magneto-hydrodynamics. The AFRL also awarded P&WR a $2.35 million contract through 2013 to perform risk-reduction tests on key components of the Third Generation Reusable Booster (3GRB) rocket engine design. The 3GRB is a technology demonstration program for future USAF spaceflight missions. Last year, P&WR won the first phase of the 3GRB contract. The second phase will focus on risk-reduction tests aimed at maturing the most critical technologies to that engine's design.