High-capacity heat intensity fuel gas generator with air and alcohol as propellants
A gas generator and propellant technology, applied in the field of high heat capacity gas generators, can solve the problems of increasing flow and pressure, not meeting the requirements of high-pressure quick start and rapid shutdown of the injection system, etc., to achieve rapid shutdown, The effect of high complex load bearing capacity, high stiffness and strength
Active Publication Date: 2022-07-01
中国空气动力研究与发展中心设备设计与测试技术研究所
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Problems solved by technology
[0005] Second, the structure of the combustion chamber of these two gas generators is similar to the main combustion chamber of the gas turbine. Except for parts such as fuel nozzles, swirlers and supports, other parts such as flame tubes, heads, caps, etc. are thin. The wall is made of high-temperature alloy sheet metal, light in weight, suitable for small impact load, low-pressure slow start working state (ignition start with small flow, slowly increase flow and pressure until the rated working state is reached), and does not meet the high-pressure fast start of the injection system. Quick start and shutdown requirements
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Embodiment 1
[0066] The design parameters of the high-capacity heat-intensity gas generator using air and alcohol as propellants in this embodiment are shown in Table 1, and the main structural parameters are shown in Table 2. The diameters of the inner and outer main combustion holes are 8 and 7.1, respectively. The numbers of the main combustion holes and the outer main combustion holes are 16 and 32 respectively; the diameter of the mixing holes is 10 and the number is 30. The total pressure loss coefficient λ of the multi-channel diffuser is 2%, the efficiency η of the multi-channel diffuser is 95%, and the diameter of the diffuser inlet is 125. Through the pre-written calculation software, the outlet diameter of the multi-channel diffuser is calculated to be 200, The total length of the gas generator is 1190.
[0067] It can be seen from Table 1 that the inflow air temperature of the high-capacity heat-intensity gas generator using air and alcohol as propellants in this embodiment is ...
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The invention belongs to the technical field of fuel gas generators, and discloses a high-capacity heat intensity fuel gas generator with air and alcohol as propellants. With the incoming flow direction of airflow as the front, the front end of the fuel gas generator pressure-bearing shell is a gas inlet communicated with a gas inlet pipeline, and the rear end of the fuel gas generator pressure-bearing shell is a gas outlet communicated with a high-temperature fuel gas pipeline; the interior and an inner cavity sequentially comprise an expansion section, an equal straight section and an outlet section, and a flame tube is arranged on the central axis; a fuel alcohol liquid supply pipeline and an alcohol nozzle assembly are sequentially fixed to the outer portion and the front section, and fuel alcohol is injected into the swirler assembly of the inner cavity. A flame tube positioning pin assembly, a semiconductor ignition electric nozzle assembly and a flame tube guide pin assembly are sequentially fixed to the middle section, the flame tube positioning pin assembly and the flame tube guide pin assembly are inserted into the shell to fix the flame tube, and the semiconductor ignition electric nozzle assembly is inserted into the shell to ignite combustible premix sprayed out of an adapter disc of the flame tube. The fuel gas generator can be quickly started at high pressure, stable combustion efficiency is high, turning-off is quick, and the service life is long.
Description
technical field [0001] The invention belongs to the technical field of gas generators, in particular to a high-capacity heat-intensity gas generator using air and alcohol as propellants. Background technique [0002] In the ejection fields such as aerospace and negative pressure / vacuum pumping systems, there is a demand for high performance and small-scale development of ejector systems, and the development of miniaturization, high-pressure quick start, high temperature, high Mach number, large flow, close Rapid and economical ejection technology is an effective way to meet the needs of high performance and small-scale development of ejector systems. The gas generator is a device that obtains high-temperature gas by burning the propellant, which can improve the ejection efficiency of the ejector, so the gas generator is often used in the field of ejection. [0003] The existing single-tube combustion gas generators and annular combustion chamber gas generators that use etha...
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IPC IPC(8): F23R3/28F23R3/38F23Q3/00
CPCF23R3/286F23R3/38F23Q3/004F23Q3/008
Inventor 李先锋陶瑜任泽斌褚卫华赵芳
Owner 中国空气动力研究与发展中心设备设计与测试技术研究所