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논문 기본 정보

자료유형
학술저널
저자정보
양인영 (한국항공우주연구원) 이보화 (한국항공우주연구원)
저널정보
한국유체기계학회 한국유체기계학회 논문집 한국유체기계학회 논문집 제19권 제2호
발행연도
2016.4
수록면
5 - 10 (6page)

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초록· 키워드

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Gas flow measurement in a closed duct was performed using multi-point Pitot tubes. Measurement uncertainty was assessed for this measurement method. The method was applied for the measurement of air flow into a gas turbine engine in an altitude engine test facility. 46 Pitot tubes, 15 total temperature Kiel probes and 9 static pressure tabs were installed in the engine inlet duct of inner diameter of 264 ㎜. Five tests were done in an airflow range of 2~10 ㎏/s. The flow was compressible and the Reynolds numbers were between 450,000 and 2,220,000. The measurement uncertainty was the highest as 6.1% for the lowest flow rate, and lowest as 0.8% for the highest flow rate. This is because the difference between the total and static pressures, which is also related to the flow velocity, becomes almost zero for low flow rate cases. It was found that this measurement method can be used only when the flow velocity is relatively high, e.g., 50 ㎧. Static pressure was the most influencing parameter on the flow rate measurement uncertainty. Temperature measurement uncertainty was not very important. Measurement of boundary layer was found to be important for this type of flow rate measurement method. But measurement of flow non-uniformity was not very important provided that the non-uniformity has random behavior in the duct.

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ABSTRACT
1. 서론
2. 기체 유량 측정 및 불확도 평가 방법
3. 측정 불확도 평가 및 분석
4. 결론
References

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UCI(KEPA) : I410-ECN-0101-2016-554-002770650