Multi-edge multi-output testing device for thermal insulation layer of rocket engine

Abstract

The embodiment of the invention provides a multi-edge multi-output testing device for a heat insulating layer of a rocket engine. The multilateral multi-outlet testing device comprises a testing engine unit, at least two tail pipe units and at least two spray pipe units, the test engine unit is provided with a combustion chamber and at least two output ends; each output end is provided with a fuel gas channel, and the two ends of the fuel gas channel are communicated with the combustion chamber and the external environment of the test engine unit respectively. One end of each tail pipe unit is detachably connected with the test engine unit, is communicated with the corresponding fuel gas channel, and is used for correspondingly bearing different types of heat insulation layer test pieces and forming the same test environment; and each spray pipe unit is detachably connected to one end, far away from the test engine unit, of the corresponding tail pipe unit. According to the embodiment of the invention, different types of heat insulation layer test pieces can be in the same test environment in the channels on the premise of multiple channels, the assessment precision is improved, and the test cost is reduced.

Description

technical field [0001] The present application relates to the technical field of solid rocket motor testing, in particular, the present application relates to a multi-edge and multi-outlet testing device for the thermal insulation layer of a rocket motor. Background technique [0002] The heat insulation layer is a key component of the solid rocket motor, which protects the shell from heat, ensures that the shell is not burned through or loses strength due to heat, protects the shell from corrosion of the grain, and buffers the gap between the grain and the shell. Bonding stress, for the filament wound casing, can also ensure the airtightness of the filament wound casing. Therefore, it is necessary to conduct an ablation test of the insulation layer to assess its ablation resistance. [0003] However, the existing ablation test methods for adiabatic layer generally have the following defects: [0004] 1. The test environment is quite different from the real working environ...

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Problems solved by technology

[0004] 1. The test environment is quite different from the real working environment, and the accuracy of the ablation performance parameters obtained by the test is low;

[0005] 2. A single test is limited to the ablation of a single insulation layer specimen, and it is difficult to reproduce the same high-precision test environment by using divided tests for different types (for example, different types, or different batches, etc.) of insulation layer specimens , that is, the accuracy of the ablation performance parameters of each insulation layer specimen obtained through the batch test in the same test environment is low;

[0006] 3. A single test is limited to the ablation of a single insulation layer specimen. The fuel and time consumed by each test can only obtain the ablation performance parameters of one insulation layer specimen, and the test cost is high

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