Condensing flow induced vibration (CFIV) of the rotor blade is a tough problem for designers of nuclear turbines because nonequilibrium condensing flow excitation (NECFE) is hard to be directly modeled. Generally, in design, NECFE is assumed as equilibrium condensing flow excitation (ECFE), of which the pressure fluctuations caused by phase temperature difference (PTD) between gaseous and liquid are ignored. In this paper, a novel method to calculate the equivalent load of NECFE based on the principle of virtual work was proposed. This method could consider the effects of PTD-induced pressure fluctuations by simulating nonequilibrium condensation with ANSYS cfx, and improve computational efficiency. Once the equivalent NECFE load is determined, CFIV of the rotor blade, which was modeled as a pretwisted asymmetric cantilever beam, can then be predicted by the finite element method (FEM). Additionally, to estimate the effects of PTD-induced pressure fluctuations, comparisons between NECFE and ECFE as well as their induced vibrations were presented. Results show that PTD in nucleation area could change the position and type of shock waves, restructure the pressure distribution, as well as enhance the pressure fluctuations. Compared with ECFE, the frequency ingredients and amplitude of the equivalent NECFE load and its induced vibrations are increased. Specifically, the amplitude of the equivalent NECFE load is increased by 9.38%, 15.34%, and 7.43% in the tangential component, axial component, and torsion moment. The blade vibration responses induced by NECFE are increased by 11.66% and 19.94% in tangential and axial.
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November 2018
Research-Article
Wet Steam Nonequilibrium Condensation Flow-Induced Vibrations of a Nuclear Turbine Blade
Bing Guo,
Bing Guo
School of Mechanical Engineering,
Shandong University,
Jinan 250061, China;
Shandong University,
Jinan 250061, China;
Key Laboratory of High Efficiency and Clean
Mechanical Manufacture,
Ministry of Education,
Jinan 250061, China;
Mechanical Manufacture,
Ministry of Education,
Jinan 250061, China;
National Demonstration Center for Experimental
Mechanical Engineering Education,
Jinan 250061, China
e-mail: guobingsdu@163.com
Mechanical Engineering Education,
Jinan 250061, China
e-mail: guobingsdu@163.com
Search for other works by this author on:
Weixiao Tang
Weixiao Tang
School of Mechanical Engineering,
Shandong University,
Jinan 250061, China;
Shandong University,
Jinan 250061, China;
Key Laboratory of High Efficiency and Clean
Mechanical Manufacture,
Ministry of Education,
Jinan 250061, China;
Mechanical Manufacture,
Ministry of Education,
Jinan 250061, China;
National Demonstration Center for Experimental
Mechanical Engineering Education,
Jinan 250061, China
e-mail: tangwx@sdu.edu.cn
Mechanical Engineering Education,
Jinan 250061, China
e-mail: tangwx@sdu.edu.cn
Search for other works by this author on:
Bing Guo
School of Mechanical Engineering,
Shandong University,
Jinan 250061, China;
Shandong University,
Jinan 250061, China;
Key Laboratory of High Efficiency and Clean
Mechanical Manufacture,
Ministry of Education,
Jinan 250061, China;
Mechanical Manufacture,
Ministry of Education,
Jinan 250061, China;
National Demonstration Center for Experimental
Mechanical Engineering Education,
Jinan 250061, China
e-mail: guobingsdu@163.com
Mechanical Engineering Education,
Jinan 250061, China
e-mail: guobingsdu@163.com
Weixiao Tang
School of Mechanical Engineering,
Shandong University,
Jinan 250061, China;
Shandong University,
Jinan 250061, China;
Key Laboratory of High Efficiency and Clean
Mechanical Manufacture,
Ministry of Education,
Jinan 250061, China;
Mechanical Manufacture,
Ministry of Education,
Jinan 250061, China;
National Demonstration Center for Experimental
Mechanical Engineering Education,
Jinan 250061, China
e-mail: tangwx@sdu.edu.cn
Mechanical Engineering Education,
Jinan 250061, China
e-mail: tangwx@sdu.edu.cn
1Corresponding author.
Contributed by the Structures and Dynamics Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received June 18, 2017; final manuscript received March 23, 2018; published online July 31, 2018. Assoc. Editor: Alexandrina Untaroiu.
J. Eng. Gas Turbines Power. Nov 2018, 140(11): 112503 (11 pages)
Published Online: July 31, 2018
Article history
Received:
June 18, 2017
Revised:
March 23, 2018
Citation
Guo, B., and Tang, W. (July 31, 2018). "Wet Steam Nonequilibrium Condensation Flow-Induced Vibrations of a Nuclear Turbine Blade." ASME. J. Eng. Gas Turbines Power. November 2018; 140(11): 112503. https://doi.org/10.1115/1.4039834
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