...Yuan-wei Lyu; Jing-zhou Zhang; Xi-cheng Liu; Yong Shan Impinging heat transferred by a pulsed jet induced by a six-chevron nozzle on a semicylindrical concave surface is investigated by varying jet Reynolds numbers (5000 ≤ Re ≤ 20,000), operational frequencies (0 Hz ≤ f ≤ 25 Hz), and dimensionless...

... the periodic-transient method. For example, to design air-jet impingement cooling for a solar receiver window, heat transfer coefficients had to be measured on the concave surface of the window. The window is an axially symmetric piece that can be approximated by a hemisphere with a cylindrical extension...