Numerical and experimental studies on circulation of working fluid in liquid droplet radiator

Automatic Circulation Control of Working Fluid in Liquid Droplet Radiator

“…It is known that the pressure in the droplet generator P1 required to emit the working fluid with the quantity of flow Q from the nozzle is expressed by the following equation 2) ,…”

“…al. have clarified the circulation mechanism of the working fluid in LDR, which consists of a droplet generator, a droplet collector, a gear pump and a bellows-type pressure regulator, by numerical analyses and experiments 2) . They have showed that the circulation mechanism allows to control manually the circulation of working fluid in the liquid droplet radiator.…”

Analysis of the radiation heat transfer process of phase change for a liquid droplet radiator in space power systems

“…However, only a few attempts have been made to examine LDR performance under microgravity conditions. Therefore, a number of problems regarding the future space use of LDR remain unanswered [8]. This warrants the necessity of conducting an equationbased analysis of heat transfer in LDR that can serve as a guide in future experimentation.…”

“…The fluid dynamics, thermal characteristics, and optimal design parameters of the radiator system is designed with the goal of reducing mass, increasing radiation efficiency, and reducing the electrical energy required to circulate the refrigeration fluid. Many experimental studies have been conducted to evaluate the performance of LDR based on these parameters [6][7][8]. However, only a few attempts have been made to examine LDR performance under microgravity conditions.…”

“…A liquid droplet radiator (LDR) is an advanced heat rejection subsystem for high-power space systems and is a prerequisite for large space structures (LSS) [1][2][3][4][5][6][7][8]. The operation principle of the LDR is as follows.…”