Pumping engines are one of the jet engines that operates using pressure changes from high-speed air currents under velocity changes to achieve gas compression。
Pumping engines consist of three sections of the vent (also known as amplifiers), the combustion chamber and the propulsion hose. By application range, three categories are currently divided into subsonic, ultrasonic and hypersonic。
Pumping engines are much simpler than turbine jet engines. Erosion is the process of slowing down and increasing static pressure using a frontal current into the engine. This process does not require a complex pressurizer for high-speed rotation, but is also the greatest advantage of the jet engine。
Air pressure is theoretically 37 times higher and is highly efficient when the rate of infusion is three times the sound speed. High-speed air currents are reduced by expansion, air pressure and temperature rise, and enter the combustion chamber with fuel combustion. The temperature after combustion is 20001200°c, or even higher, and it expands at an accelerated rate and is excreted at high speed from the vent, generating push. Therefore, the thrust of the thrust engine is related to the speed of the advance. When gas is pumped at three times the sound speed, the static thrust produced on the ground can be as high as 200 thousand cattle。
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Video author: lesics; video translation: titanium cope
Scrap engines can be divided into subsonic, ultrasonic and hypersonic。
Subsonic pressurized engines are fueled by aerial kerosene, using diffuse vents and condensed nozzles. The rate of increase during flight does not exceed 1. 89 and the number of flights is less than 0. 5 hours. Subsonic thrust engines are used on subsonic aircraft, such as subsonic targetrs。
Supersonic rush engines use ultrasonic vents (subsonic gas currents at the entrance to the combustion chamber) and condensed or constricted diffuse nozzles, using aviation kerosene or hydrocarbon-type fuels. The speed of propulsion of the ultrasonic impulse engine is subsonic to six times the speed of sound and is used for ultrasonic goalers and surface-to-air missiles (generally in conjunction with solid rocket engines)。
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