Hot-wire probe design and calibration for high-speed, high-temperature flows
| Autor: | Scott C. Morris, Arman Mirhashemi, Joshua Szczudlak |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Measurement Science and Technology. 32:044002 |
| ISSN: | 1361-6501 0957-0233 |
| DOI: | 10.1088/1361-6501/abcefc |
| Popis: | The use of hot-wire anemometry in high-speed, high-temperature flows with large temperature variations presents additional challenges compared with measurements in an incompressible flow at a nearly constant temperature. This work focuses on the use of hot-wires under conditions with a flow velocity of up to 455 m s − 1 , temperatures up to 650 K , and mean temperature variations of approximately 100 K . This research was motivated by experiments simulating some of the conditions of the high-pressure turbine inlet region of a gas-turbine engine. Two separate factors in this work facilitated hot-wire measurements under the above conditions. The first was the design of a custom hot-wire probe and sensor attachment procedure. The design used high-temperature materials capable of meeting the structural requirements of high-speed flow. The second objective was the development of a new temperature compensation method to provide low bias errors over a large range of gas temperatures and Mach numbers. The results demonstrate that both probe and sensor were able to operate at high Mach number and high-temperatures for several days without issue. Mean velocity results are compared with pneumatic probe measurements, and are found to be within the expected range of uncertainty. |
| Databáze: | OpenAIRE |
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