열유체공학설계실습 수두손실(Head loss)
- 최초 등록일
- 2019.03.22
- 최종 저작일
- 2018.07
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한컴오피스
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소개글
열유체공학설계실습 과목 수두손실 실험 결과 레포트입니다.
A+받은 자료입니다.
목차
1. Instruction
1) Objective of Experiment
2) Theory used in experiment
2. Methods and Apparatus
3. Results
A. Experiment 1: Pipe flow with friction
B. Experiment 2: Pipe elbow
C. Experiment 3: Cross-section change
D. Experiment 4: Volumetric flow measurement with Orifice
4. Discussion
5. Conclusion
6. Reference
7. Appendices
본문내용
Fluid flows through the pipe and loses energy due to friction with the wall. The losses are frictional losses due to friction and there are minor losses such as inlet and outlet of the pipe, expansion or constriction of the pipe, and joints of the bends and elbows. In order to measure these losses and to determine what factors affect the loss, the experiment is divided into four categories: friction losses in straight pipe experiments, loss coefficient in elbows and bend pipes, loss coefficient of expansion and constriction, flow rate measurement through pressure drop. We measured pressure difference and flow rate through the experiment and analyzed each experiment. We made various assumptions while analyzing, so there were many errors in the process. The larger the flow rate, the larger the velocity and the larger the Reynold’s number, eventually the greater the losses. Error rates ranged from 0.5% to several hundred %. Before the experiment, I think that the friction losses accounted for the majority of the losses and the loss due to the fittings and valves was not so large. But because the length of the pipe was short, the losses of the elbow, expansion and constriction was also large, and sometimes it was larger than the minor losses.
참고 자료
Frank M. White “Fluid Mechanics 7th”, 2012, McGraw-Hill
“Head losses”
http://www.ce.utexas.edu/prof/kinnas/319LAB/Lab/Lab%208-Head%20Losses%20in%20Pipe%20Flow/Lab8.htm [sep, 27. 2018]
“Orifice plate” https://en.wikipedia.org/wiki/Orifice_plate [oct. 1. 2018]
“Vena contracta” https://en.wikipedia.org/wiki/Vena_contracta [oct, 1. 2018]