A precooling type axisymmetric inlet duct test device and a flow field control method in a bypass flow path thereof

By setting up a bypass flow path partition and driving device in the pre-cooled axisymmetric intake channel, the opening and closing of the bypass flow path is controlled, and the problem of excessive intake channel temperature in the traditional propulsion system under high Mach numbers is solved. Higher intake duct performance and aerodynamic performance are achieved.

CN117347031BActive Publication Date: 2024-12-13NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Application Number
CN202311427401.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-10-31
Publication Date
2024-12-13
Estimated Expiration
2043-10-31

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Abstract

The present invention discloses a pre-cooling axisymmetric inlet duct test device and a method for controlling the flow field in the bypass flow path. The test device described in the invention includes a lip cover, an expansion section, a center body, a contraction section, a pre-cooler resistance member, a bypass flow path baffle, a sleeve, a driving device, and a slot; the control method is to form a bypass flow path by fixing the bypass flow path baffle in the expansion section, adding an extra flow path in the expansion section, and driving a stepper motor to drive the outer sleeve of the bypass flow path baffle to move back and forth to realize the opening or closing of the bypass flow path, so as to control the internal flow field. Compared with the prior art, the present invention can verify the total pressure recovery coefficient of the inlet duct when the bypass flow path is open and closed, and provide test data for the design of the pre-cooling axisymmetric inlet duct.
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Citation Information

Patent Citations

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