Engineering Journal: Science and InnovationELECTRONIC SCIENCE AND ENGINEERING PUBLICATION
Certificate of Registration Media number Эл #ФС77-53688 of 17 April 2013. ISSN 2308-6033. DOI 10.18698/2308-6033
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Article

Simulation of intense heat-power effect of a gas environment for testing samples in a wide range of parameters

Published: 04.12.2020

Authors: Mosolov S.V., Partola I.S., Kudinov A.S., Yurchenko I.I., Klimenko A.G., Fedorov S. A.

Published in issue: #12(108)/2020

DOI: 10.18698/2308-6033-2020-12-2038

Category: Aviation and Rocket-Space Engineering | Chapter: Aerodynamics and Heat Transfer Processes in Aircrafts

The results of the work extend the available range of the parameters of gas acting on the samples of materials and coatings being tested under intense heat and power loads to study their properties and resource characteristics under stationary and pulsed exposure. A feature of the conditions proposed in this work for testing samples, distinguishing them from most common existing methods, is the simultaneous impact of a high temperature flux and high-pressure flow on the sample surface, the possibility of obtaining an oxidizing or reducing medium with different chemical compositions, as well as a pulsed cyclic effect on a material sample. The high performance of the experimental setup allows for up to 10 sample tests per day. To perform the research of the samples, a supersonic gas jet with nominal mode regimes was modeled. The jet was generated by gas dynamics facility through carbohydrate and oxygen mixture combustion and flow acceleration in Laval nozzle. Test sample can be positioned under various angles relative to the jet axis and on the desired distance from the nozzle edge. If necessary, the sample can be provided with measurement devices allowing measurements of temperature, heat flow and pressure. In order to provide a calibrated effect on the samples, the fields of jet parameters were studied using calibration plates provided with surface pressure sensors and thermocouples for determining heat fluxes. As a result, parameter fields of pressure, heat fluxes, pressure gradients, and friction stresses on the surface of samples were obtained depending on samples orientation and gas jet thermodynamic properties. Considering these field of parameters, tests can be performed to study the properties of materials. Metal and composite materials can be used as test samples as well as samples for testing the durability of coatings, multi-layer structures and protective fabric materials.


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