RT Journal Article ID 5ab3383e5ded2581 A1 Pham, Nang T. A1 Frate, David T. A1 Chao, David F. A1 Zhang , Nengli T1 FLOW AND HEAT TRANSFER VISUALIZATION INSIDE AND OUTSIDE THE HYDRAULIC RESERVOIR OF A THRUST VECTOR CONTROL SYSTEM JF Journal of Flow Visualization and Image Processing JO JFV YR 2012 FD 2013-02-12 VO 19 IS 2 SP 121 OP 138 K1 thrust vector control K1 hydraulic reservoir K1 CFD simulation K1 flow and heat visualization K1 conjugate heat transfer AB Thrust Vector Control (TVC) systems provide a steering function for a launched vehicle during powered flight by controlling the rocket engine(s) and thrust direction. The Ares I Upper Stage design utilized a hydraulically driven TVC system. The hydraulic reservoir in the system had to be sized thus as to accommodate the heat generated during the mission. Since heat absorption by the hydraulic reservoir is a key factor in the performance of the TVC system, a series of computational fluid dynamics (CFD) simulations of the fluid flow and heat transfer in the reservoir has been performed with different operating and environmental conditions to gain insight into the flow and heat transfer outside and inside to the reservoir. The results of simulation show that the relevant data obtained in simulation, such as the inlet and outlet temperatures and the heat absorption by the reservoir, coincide with the data obtained during ground testings of the flight-like TVC system at the NASA Glenn Research Center. Three different reservoir operating conditions, which could occur during the Ares I flight, were simulated, and the relevant flow and heat transfer data were obtained. The flow and heat visualizations produced by the simulations provided valuable information about the reservoir performance. PB Begell House LK https://www.dl.begellhouse.com/journals/52b74bd3689ab10b,5c6422f23bae9627,5ab3383e5ded2581.html