Coolant-flow modeling in regeneratively cooled rocket engines fed with turbomachinery is a challenging task because of the high wall-temperature gradient, the high Reynolds number, the high aspect ratio of the channel cross section, and the curved geometry. In the present study, to better comprehend the role of the thrust-chamber shape of a rocket engine on the heat exchange, computations of supercritical hydrogen flow in single- and double-curvature channels are carried out. In particular, a parametric numerical analysis of the flow in an asymmetrically heated rectangular channel with a high aspect ratio and various radii of curvature is performed by means of a Reynolds. averaged Navier Stokes solver for real fluids, which is validated against experimental data of heated and curved. channel flow taken from open literature. Results permit the effect of curvature on global heat transfer coefficient, pressure loss, and bulk temperature increase to be quantified.
Analysis of Curved-Cooling-Channel Flow and Heat Transfer in Rocket Engines / Pizzarelli, Marco; Nasuti, Francesco; Onofri, Marcello. - In: JOURNAL OF PROPULSION AND POWER. - ISSN 0748-4658. - STAMPA. - 27:5(2011), pp. 1045-1053. ((Intervento presentato al convegno AIAA/ASME/SAE/ASEE 46th Joint Propulsion Conference and Exhibit tenutosi a Nashville, TN nel JUL 25-29, 2010 [10.2514/1.b34163].