| Numerical Investigation of the Influence of Reynolds Number on Probe Measurements |
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| 作者姓名： | 李宇红 |
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| 作者单位： | LI Yuhong，Bohn D.Department of Thermal Engineering，Tsinghua University，Beijing 100084，China; Institute of Steam and Gas Turbines，Technology University of Aachen，Germany [ |
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| 基金项目： | the Special Funds for Major State Basic
Research Project |
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| 摘 要： | Multi-holepneumaticprobesarecommonlyusedinturbomachinerymeasurementsbecausetheyaresimple,cheap,anddurable,especiallysincetheycansimultaneouslymeasurevelocityandpressure.TheprobemeasurementsarebasedonflowsimilaritywithReasoneofthebasicsimilaritycriteria.However,theinfluenceofReonprobemeasurementsisnotconsideredinprobecalibrationsbecauseofthedifficultiesinherentinRebasedcalibration.MostofthelimitedexperimentalinvestigationsonthisproblemfocusedondeterminingRerangeinwhichtheinfluencecanbeneglect…
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Numerical Investigation of the Influence of Reynolds Number on Probe Measurements |
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| LI Yuhong,Bohn D.Numerical Investigation of the Influence of Reynolds Number on Probe Measurements[J].Tsinghua Science and Technology,2000,5(4). |
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| Authors: | LI Yuhong Bohn D |
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| Abstract: | The influence of Reynolds number (Re) on probe measurements was investigated numerically, including the effects of the pressure holes and their geometry to obtain accurate hole-pressures. The results indicate that Re influences the probe measurements and cannot be neglected for Re larger than 10 5 and that the influence increases with Mach number (Ma). The calculations show that the pressures in the downwind holes are influenced more by Re than those of the upwind and central holes when the probe is at an angle. Thus, 7-hole probes may be more suitable for measurements at different Re than 5-hole probes. |
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| Keywords: | Reynolds number multi-hole probe numerical simulation pressure coefficient |
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