Device and method for measuring flow rate in ramjet combustor film cooling jacket

Abstract

The invention relates to a gas flow testing device and method. For the defect that the structure size of an existing pitot pipe is large and flow field measurement for cooling jackets of small structural size cannot be carried out, the invention provides the device and method for measuring the flow rate in a ramjet combustor film cooling jacket. The device comprises a measuring rake and a combustor filler neck, wherein the measuring rake includes a cylindrical rake core, a static pressure guiding pipe, a total pressure guiding pipe, a static pressure filler neck and a total pressure filler neck; the static pressure filler neck and the total pressure filler neck are arranged on the top of the rake core; the outer circumference of the rake core is provided with a positioning shaft shoulder;a static pressure guiding pipe mounting through hole and a total pressure guiding pipe mounting through hole are arranged in the rake core; the static pressure guiding pipe and the total pressure guiding pipe correspondingly penetrate through the static pressure guiding pipe mounting through hole and the total pressure guiding pipe mounting through hole; the tops of the static pressure guiding pipe and the total pressure guiding pipe are correspondingly connected with the static pressure filler neck and the total pressure filler neck; the lower end of the static pressure guiding pipe is flushwith the lower end surface of the rake core; the lower end of the total pressure guiding pipe protrudes from the lower end surface of the rake core and is bent by 90 degrees; and the measuring rake isfixedly connected with the combustor filler neck through the total pressure guiding pipe and an outer sleeve nut.

Description

technical field [0001] The invention relates to an air flow testing device and method, in particular to a device and method for measuring the flow velocity in a film cooling jacket of a combustion chamber of a ramjet engine. Background technique [0002] The flow field distortion in the intake port and combustion chamber of an air-breathing engine directly affects engine performance and is one of the most important concerns in engine design. The measurement of flow field distortion is an important work in engine test development. [0003] The ramjet is the main power device of the ballistic cruise missile. The length of the air inlet has a great influence on the distortion of the flow field, which is mainly manifested in two aspects: the difficulty of combustion structure and the poor effect of air film cooling. Especially for the film cooling effect, through the flow field simulation, it is found that when the structural design of the ramjet engine is unreasonable, the dis...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantage that the existing pitot tube has a relatively large structural size and cannot measure the flow field of cooling jackets with a structural size of about 10mm or even smaller, and provide a method for measuring the flow velocity in the film cooling jacket of the combustion chamber of a ramjet device and method

Images