Test tool of direct-current-centrifugal two-component nozzles

Abstract

The present invention provides a test tool of direct-current-centrifugal two-component nozzles. The test tool comprises a gas oxidant chamber, a liquid fuel collection chamber and a backpressure chamber which are detachably connected with one another from left to right; a tapered through-hole which extends in a left-and-right direction is formed in the liquid fuel collection chamber; the tapered through-hole is communicated with the liquid fuel collection chamber and the backpressure chamber; the inner diameter of the left side of the tapered through-hole on is greater than the inner diameterof the right side of the tapered through-hole; a nozzle is arranged in the tapered through-hole in an interference fit manner; the inner cavity of the nozzle is communicated with the gas oxidant chamber and the backpressure chamber; and the spiral groove of the nozzle is communicated with the liquid fuel collection chamber and the backpressure chamber. With the test tool of the invention adopted,a test nozzle and a working nozzle can be tested and calibrated simultaneously, so that the structural consistency of the two nozzles can be ensured; the tapered through-hole can achieve interferencefit between the nozzle and the liquid fuel collection chamber, so that machining accuracy can be reduced with sealing requirements satisfied; and liquid fuel collection chambers of different lengths can be selected as required to meet the test requirements of nozzles in different specifications.

Description

technical field [0001] The invention relates to the technical field of aerospace engines, in particular to a test tool for a direct current-centrifugal two-component nozzle. Background technique [0002] In the design and testing process of aerospace engines, in order to improve the test accuracy and test efficiency, it is inevitable to use various test fixtures. Among them, the atomization performance test of the engine nozzle is an important part of the engine test, so the design and selection of the nozzle test tool is particularly critical. [0003] Generally, a nozzle that atomizes one type of engine fuel is simply called a "single-component nozzle", and a nozzle that atomizes two kinds of engine fuel is called a "two-component nozzle". In the nozzle of this test tool, the straight channel in the middle is the flow channel of the oxidant, which allows the oxidant to pass through in a "straight line"; the spiral groove on the outer ring surface is the channel of the liq...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a test tooling for direct current-centrifugal dual-component nozzles to solve the problems of difficult to meet the sealing requirements in the test of nozzles in the prior art, repeated disassembly and assembly tests of nozzles, difficulty in measuring pressure drop, and material costs. Problems such as high cost and insufficient applicability of test tooling

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