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Along with the development of modern high-technology, the heat generation of many equipments that were heated in unit area becomes more and more, usually it is over 100W/cm2, even 103~104W/cm2, such as super power integrate circuit, high temperature battery for electricity generation, nuclear reactor, high power mini-machinery, mini-sized steam turbine, superconductive electricity generation and distribution devices and airship. Due to the trend of high rate heat generation, a new cooling technology is needed to solve the problem between design flexibility, needed space and heat-dissipating performance. A new period of heat pipe began with Pulsation Heat Pipe, invented by Japanese Doctor H. Akachi in 1994, later is called Self-Exciting Mode Oscillating-Flow Heat Pipe[1, 2] (SEMOS Heat Pipe). Although it is just known less than sixteen years, the SEMOS Heat Pipe is drawing worldwide attention because of its immeasurable application potency. A lot of research about the SEMOS Heat Pipe is doing in Japan, U.S.A, Germany, Russia, Ukraine and China[3-5]. Notwithstanding all the research done is to understand the working principles of SEMOS Heat Pipe because it is still at its initial stage, this new high effective heat transfer device is catching attention on heat transfer due to phase transition all over the world. Thus the contradiction between cooling device downsizing and heat generation increasing is still the major technical problem to improve and bring the heat-dissipating performance to a higher lever for all of the researchers along with the development of new high-technology.

The Heat Transfer Enhancement Analysis and Experimental Investigation of Non-Uniform Cross-Section Channel SEMOS Heat Pipe