High-precision micro-jet test pipeline device

Abstract

The invention relates to a high-precision micro-jet test pipeline device. The high-precision micro-jet test pipeline device comprises a flowmeter, a pressure lowering and stabilizing valve group, a multi-position digital valve and a pressure stability cavity, wherein high-pressure gas is connected with the flowmeter, the flowmeter is connected with the pressure lowering and stabilizing valve group, the pressure lowering and stabilizing valve group is connected with the multi-position digital valve, the multi-position digital valve is connected with the pressure stabilizing cavity, the pressure stabilizing cavity is connected with a test piece jet hole plate, the multi-position digital valve comprises an air inlet and collecting chamber, a plurality of Laval nozzles, a plurality of electromagnetic valves and an air discharge and collecting chamber, the air inlet and collecting chamber is provided with a plurality of air outlets, one Laval nozzle is mounted at each air outlet, each Laval nozzle is connected with one electromagnetic valve, the air discharge and collecting chamber is provided with corresponding number of air inlets, and each electromagnetic valve is connected with the air inlet at the corresponding positon of the air discharge and collecting chamber. The high-precision micro-jet test pipeline device has the advantages that when the high-precision micro-jet test pipeline device is applied to an air inlet channel micro-jet flow controlled wind tunnel test, the device is stable in operation, jet flow is adjustable in a range of 0-0.032kg / s, and the device is high in flow control and measuring precision.

Description

technical field [0001] The invention specifically relates to a high-precision micro-jet test pipeline device. Background technique [0002] With the continuous development of aviation technology, many departments at home and abroad have carried out active and passive flow control research on the problem of ultra-compact S-shaped inlet flow separation. The control methods are different, but the general idea is to reduce the flow separation in the inlet. , Improve the total pressure recovery system, reduce flow distortion, etc. The control method involves vortex generator, vibrating spoiler, synthetic jet, micro jet and so on. The micro-jet control method has achieved remarkable results and has broad application prospects. However, the original micro-jet test pipeline device has the following problems: 1) The flow rate is measured by a simple sonic nozzle, and the flow measurement accuracy is poor; 2) The flow control adopts continuous high-pressure regulation Ball valves ha...

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Problems solved by technology

The micro-jet control method has achieved remarkable results and has broad application prospects. However, the original micro-jet test pipeline device has the following problems: 1) The flow rate is measured by a simple sonic nozzle, and the flow measurement accuracy is poor; 2) The flow control adopts continuous high-pressure regulation Ball valves have poor adjustment characteristics for small flow rates, and it is difficult to achieve precise control of small flow rates; 3) The integrated design of the pipeline pressure stabilizing chamber and the model, the sealing contact surface is a curved surface, and the air leakage is serious

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