Performance Evaluation of a Rake Used for Measuring Total Pressure and Total Temperature Inside an Engine Inlet Duct

Lee, Bohwa; Kim, Chuntaek; Yang, Inyoung; Lee, Kyung-Jae; Lee, Yangji

doi:10.1007/s42405-019-00153-w

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…To further validate the measured target temperature and the correctness of the recalibrated simulation model, and to demonstrate the guiding role of the simulation model, equation (8) and the recalibrated simulation model are used to predict the outlet temperature (T4) under a current of 60 A. After attempting, it was found that under the 60 A condition, only the temperature at measurement point 4 can be measured, which can be used to validate the simulation prediction.…”

Section: Prediction Of Outlet Temperature At 60 a Currentmentioning

confidence: 99%

The high-temperature gas soft measurement method based on the temperature attenuation patterns of flowing argon gas inside a cavity

Yang,

Wang,

Chu

et al. 2024

Meas. Sci. Technol.

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The device for generating the airflow temperature signal is employed in aircraft ground simulation. This process involves heating the argon gas by the arc discharge to generate high-temperature gas, which subsequently flows into the cavity and mixes with cold gas to produce the temperature signal. However, the temperature of argon gas at the entrance of the cavity is excessively high, and sensor installation is challenging, making direct measurement difficult. This paper introduces a high-temperature gas soft measurement method (HTGSM) based on the temperature attenuation patterns of flowing argon gas inside the cavity, and establishes a mathematical model for the flow and temperature distribution of argon gas within the cavity. The method calculates the target temperature at the entrance of the cavity by measuring the lower-temperature argon gas at the outlet of the cavity. Furthermore, a simulation and experimental platform were set up to validate the proposed method. The experimental results indicate that there is an 7.9% deviation between the soft measurement values and the directly measured values of argon gas temperature in the middle of the cavity. At the outlet of the cavity, the maximum deviation between the directly measured argon gas temperature and the simulation calculation results based on the soft measurement values at the entrance temperature is 5.2%. The paper rigorously validates the accuracy of the soft measurement method from various perspectives. Notably, this method offers the advantage of remote indirect measurement, and indirectly expanding the upper limit of the temperature sensor.

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Section: Prediction Of Outlet Temperature At 60 a Currentmentioning

confidence: 99%

The high-temperature gas soft measurement method based on the temperature attenuation patterns of flowing argon gas inside a cavity

Yang,

Wang,

Chu

et al. 2024

Meas. Sci. Technol.

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show abstract

“…Due to the electrical circuit structure and insulation treatment of thermocouples, the probe fabrication is complex and the size is large. This is especially noticeable for multipoint total temperature probes [6]. In addition, electromagnetic interference, freezing point error, and channel error make it extremely difficult to improve the temperature measurement accuracy of thermocouple total temperature probes.…”

mentioning

confidence: 99%

Fiber Bragg Grating Total Temperature Probes for High-Speed Airflow With High Recovery Factor

Han,

Hu,

Liu

et al. 2023

IEEE Sensors J.

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The fiber Bragg grating (FBG) temperature measurement technology has advantages such as high accuracy, small size, anti-interference, and stable performance compared to traditional thermocouple technology in high-speed airflow total temperature testing. However, low recovery factors of FBG total temperature probes at low Mach numbers have been reported, which is very detrimental to improving the accuracy of the total temperature measurement. In this paper, a three-dimensional structure model of FBG total temperature probe is established based on the characteristics of fiber as the temperature sensing element. The temperature distribution under different probe structural parameters, such as the inner diameter of the shield, the position and length of FBG, is analyzed using conjugate heat transfer multi-physics field model. Combined with coupled-mode theory, the spectral characteristics of different FBG parameters and their effects on the recovery factor are analyzed. The structure of FBG total temperature probe with high recovery factor is designed. Comparative experimental results of high-speed airflow show that the improved FBG total temperature probe has a recovery factor exceeding 0.92 from Mach number 0.3 to 0.8, and up to 0.99 at Mach number greater than 0.4, which has even exceeded the level of most traditional thermocouple total temperature probes.

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A miniature, high-precision FBG-based probe with turning channel for subsonic airflow total temperature measurement

Han,

Chang,

Zhou

et al. 2025

Optics and Lasers in Engineering

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Performance Evaluation of a Rake Used for Measuring Total Pressure and Total Temperature Inside an Engine Inlet Duct

Cited by 3 publications

References 6 publications

The high-temperature gas soft measurement method based on the temperature attenuation patterns of flowing argon gas inside a cavity

The high-temperature gas soft measurement method based on the temperature attenuation patterns of flowing argon gas inside a cavity

Fiber Bragg Grating Total Temperature Probes for High-Speed Airflow With High Recovery Factor

A miniature, high-precision FBG-based probe with turning channel for subsonic airflow total temperature measurement

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