Wind tunnel test device for separating hood of plane-symmetric hypersonic aircraft

Abstract

The invention discloses a wind tunnel test device for separating a hood of a plane-symmetric hypersonic aircraft. The test device comprises a projectile body model supported by a tail supporting rod of a hypersonic wind tunnel upper mechanism and a cover body model supported by an abdomen of a hypersonic wind tunnel lower mechanism. In an initial state, the cover body model covers the head of theprojectile body model and is separated from the projectile body model without contact; in a test state, the cover body model and the projectile body model are separated and do relatively independent motion; the cover body model adopts a rod-type six-component balance to measure aerodynamic force of the cover body model, and spray pipes are symmetrically arranged on the left and right sides of thecover body model for spray pipe jet flow simulation; the projectile body model adopts a rod type six-component balance to measure the aerodynamic force of the projectile body model; the abdominal support is communicated with a pore plate pressure regulating device. The test device solves the key technical problems of two-stage model relative attitude, two-stage model separation distance adjustment, jet flow simulation, small-size balance design, model connection and the like, improves the jet flow stability of the jet pipe, and reduces the interference of abdominal support.

Description

technical field [0001] The invention belongs to the technical field of hypersonic wind tunnel tests, and in particular relates to a wind tunnel test device for the separation of a face-symmetrical hypersonic vehicle hood. Background technique [0002] When a face-symmetric hypersonic vehicle flies at hypersonic speed, the head of the projectile body will inevitably generate local high temperature and high pressure due to atmospheric friction, and the temperature can be as high as several thousand degrees. In order to prevent high temperature from damaging the projectile head, it is usually necessary to add a hood to the projectile head to prevent heat. The hood is made of ablation-resistant material. When the missile reaches a specific area, the hood will be thrown away to realize the separation of the hood. The aerodynamic characteristics of the separation process are very complicated, and it is usually necessary to combine wind tunnel tests to obtain relevant aerodynamic d...

AI Technical Summary

Problems solved by technology

For the plane-symmetrical hypersonic vehicle model with a larger body and a smaller hood, the proportion of the hood varies greatly, and the smaller size of the hood model brings great difficulties to the design of the connection and positioning of the hood

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