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- W2187797576 abstract "For the practical application of a loop-tube-type thermoacoustic system, it is important to improve its energy conversion efficiency. We propose a loop-tube-type thermoacoustic system with a diverging sub-loop tube. The sub-loop tube diverges from the main loop tube and rejoins it so that the sub-loop tube forms a loop. The main loop tube is 0.85 m high and 0.5 m wide, with 3.3 m total length. The sub-loop tube’s length from the upper side to the lower side is 0.45 m. The sub tube position is changed so that the distance from the heater to the upper part of the sub tube is 1.73, 1.83, or 1.93 m. The pressure, the phase difference between the pressure and particle velocity, and the sound intensity were calculated using a two-sensor power method with pressure measurement results. The smallest phase difference distribution was observed when the sub-loop tube is connected at 1.93 m. The highest sound intensity of 13 kW/m 2 was obtained at the prime mover top end, when a sub-loop tube was connected at 1.93 m. Because the sound intensity was 0.65 kW/m2 when a sub-loop tube was not connected, it was increased about 20-fold by connecting a sub-loop tube. The decrease in the phase difference indicates that the phase difference in the prime mover became a traveling wave phase, and this raises the energy conversion efficiency from heat to sound." @default.
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- W2187797576 date "2010-01-01" @default.
- W2187797576 modified "2023-09-27" @default.
- W2187797576 title "Effect of Sub-Loop Tube on Energy Conversion Efficiency of Loop-Tube-Type Thermoacoustic System" @default.
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