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| Destruction and Prevention of Quartz Lamp Array in High Temperature Long-term Thermal Environment Assessment Test |
| Received:October 14, 2019 Revised:November 20, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2020.10.012 |
| KeyWord:high temperature thermal environment thermal stress forced convection service life |
| Author | Institution |
| XIA Lin-shi |
Thermal Protection Experimental Center, Beijing Institute of Space Long March Vehicle, Beijing , China |
| ZHANG Li-song |
Thermal Protection Experimental Center, Beijing Institute of Space Long March Vehicle, Beijing , China |
| ZHANG Kai |
Thermal Protection Experimental Center, Beijing Institute of Space Long March Vehicle, Beijing , China |
| SHI Bao-li |
Thermal Protection Experimental Center, Beijing Institute of Space Long March Vehicle, Beijing , China |
| QI Bin |
Thermal Protection Experimental Center, Beijing Institute of Space Long March Vehicle, Beijing , China |
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| Abstract: |
| The work aims to solve the thermal damage problem in the test process of the 220 V-6 kW quartz lamp tube array on the surface of the test piece at 1200 ℃ for more than 40 min. The damage appearance of the lamp was analyzed, and the main reason for the explosion lamp was found by thermal stress calculation. A gas forced convection cooling device was designed for the thermal structure problem of the lamp head in the existing heater lamp array. The fluid simulation method was used to obtain the airflow velocity of different outlet pores on the outlet pipe under the same spacing conditions, the state of the airflow field outside the outlet pipe, and the cooling effect of the lamp head around the lamp array, to provide a basis for structural design. The test was successfully carried out in the same ground thermal environment simulation test. Based on comparison of test results with or without cooling device, the convection heat exchange device can increase the service life of the lamp and ensure the test quality. The method of forced convection protection for the lamp head can improve the thermal environment simulation temperature upper limit and effective test time of the heater during the test. It has good application and popularization value for the high temperature long-term heat environment test. |
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