A test device for spray characteristics of nozzles under simulated working conditions with a rotatable head

Abstract

The invention belongs to the field of engine combustion chamber testing, and discloses a device with the head being rotatable for testing spray characteristics of a nozzle under simulated conditions. The device comprises a tested object nozzle test piece, and is characterized by further comprising a displacement mechanism, a device body cavity, a hollow shaft assembly, a primary airflow inlet channel, a secondary airflow inlet channel, a pressure stabilizing box assembly, a fixture disc assembly, a fuel inlet pipe assembly, a measurement segment assembly and an exhaust assembly. According to the device, the primary airflow inlet channel, the secondary airflow inlet channel, the fuel inlet pipe assembly, the hollow shaft assembly and the displacement mechanism can enable the device to circumferentially rotate and vertically moves a tested object under a simulated condition without air and fuel interruption, the test state is ensured to be stable and consistent, and setting of the other structures such as the exhaust assembly can adjust the environmental pressure when various working conditions are simulated, so that measurement information is enabled to be more authentic and more comprehensive. The device can perform experimental study on spray characteristics of a the fuel nozzle under various different environments.

Description

technical field [0001] The invention relates to the field of engine combustion chamber tests, in particular to a nozzle spray characteristic test device under simulated working conditions with a rotatable head. Background technique [0002] The fuel nozzle is one of the key components of the combustion chamber of a gas turbine engine. The atomization quality of the fuel nozzle directly determines the performance of the combustion chamber. The measurement of the characteristics of the nozzle oil mist plays an important role in the design and improvement of the nozzle and the development of the combustion chamber. Therefore, researchers at home and abroad have done a lot of work in the measurement and research of nozzle fuel atomization characteristics by using advanced optical diagnostic measurement technology. [0003] However, most of the measurements and tests are carried out under normal temperature and pressure environment, and only a few measurement results are carried ...

AI Technical Summary

Problems solved by technology

[0004] Existing studies on the spray characteristics of fuel nozzles are carried out under normal temperature and pressure or normal temperature and high pressure environment, which cannot fully simulate the high temperature and high pressure or low temperature and low pressure environment in which the fuel nozzle actually works in the combustion chamber

The existing research on the spray characteristics of fuel nozzles cannot fully present the actual characteristics of fuel nozzle spray, and cannot truly reflect the quality of nozzle spray

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