关键词: 激光推进;换热器;火箭发动机;传热

Abstract: Based on the characteristic of laser-powered heat exchanger(HX) for rocket propulsion,a novel preliminary structure design of flat-plate HX was presented.Key component parts of the HX include outer shell of multilayer composite materials,high temperature resistant metals frame and internal laminar micro-channel structure of nickel alloy.High coupling efficiency for laser energy to material heat was predicted for this structure.A twodimensional temperature field model for the HX exit section was presented,and numerical results confirmed the heat stability design.A one-dimensional flow model for inner propellant in HX was developed and numerically analyzed,which gained a influence orderliness that correlating HX outlet temperature with laser radiation power density and inlet flow velocity.Pressure drop in micro-channel was well small within the specified range.

Key words: Laser Propulsion;Heat exchanger;Rocket engine;Heat transfer