A high Mach number mixed pressure inlet sliding combined control non-starting method

Abstract

The application belongs to the field of aerodynamic design of aerospace vehicles, and in particular relates to a sliding combination control non-starting method of a high Mach number mixed-pressure inlet port. It includes step 1, determining the position of the lip cover according to the start-up internal shrinkage ratio of the inlet; step 2, determining the vent hole area of ​​the inner plate of the throat and the outer plate of the throat, and opening corresponding vent holes in the vent area Step 3: Synchronously adjust the lip cover and the outer side plate of the throat through the combined sliding mechanism, so that the vent hole of the throat is fully opened; Step 4: After verifying that the air inlet adjusted by the sliding combination The combined mechanism is reversely adjusted to return to the state of the design internal shrinkage ratio. If the inlet can be started, the design is completed. If not, return to step 1. The application can reduce the starting Mach number of the high Mach number mixed-pressure inlet port, improve the starting performance of the inlet port under the condition of low Mach number, and widen the working lower limit of the inlet port.

Description

technical field [0001] The application belongs to the field of aerodynamic design of aerospace vehicles, and in particular relates to a sliding combination control non-starting method of a high Mach number mixed-pressure inlet port. Background technique [0002] The non-starting problem of the intake port is generally divided into two types: "hard" non-starting and "soft" non-starting. The factors that lead to the "hard" non-start of the intake port are mainly due to the geometric design of the intake port. In order to achieve high performance at the design point of the intake port, the internal contraction ratio needs to be as large as possible. According to Kantrowitz's starting limit theory, the internal contraction ratio is inversely proportional to the starting performance, so in order to balance the starting performance and aerodynamic performance, it is necessary to use a variable geometry method to realize the change of the internal contraction ratio. The variable g...

AI Technical Summary

Problems solved by technology

Existing methods for solving soft non-starting mainly rely on opening suction holes / grooves on the surface of the compression wall. The venting area of ​​the holes / grooves cannot be adjusted, and high Mach number cruising conditions will cause large deflation losses, and the high At the Mach number, the flow velocity in the vent hole / slot is low, and the air temperature is high, which will cause serious thermal protection problems for the vent hole / slot during long-term cruise

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