Abstract:A standing-wave thermoacoustic engine is essentially composed of a stack, two heat exchangers, and tubes; the stack has many narrow flow channels and is located inside one of the tubes. One end and the other end of the stack are thermally connected to hot and cold heat sources via the heat exchangers, respectively. When the ratio of temperatures of the heat sources exceeds a critical value, the gas inside the tubes spontaneously oscillates and the stack generates acoustical energy using heat from the hot heat … Show more
“…the pressure antinode to reduce the pressure amplitude and thereby thermal-relaxation losses. This explains why the diameter of the tube is small in the middle but large at the ends in the standing-wave TAEs with two closed ends [152][153][154][155][156]. Swift also pointed out that the optimal position of the stack is between the nodes of pressure and velocity.…”
“…the pressure antinode to reduce the pressure amplitude and thereby thermal-relaxation losses. This explains why the diameter of the tube is small in the middle but large at the ends in the standing-wave TAEs with two closed ends [152][153][154][155][156]. Swift also pointed out that the optimal position of the stack is between the nodes of pressure and velocity.…”
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