[1] Yang Qiongfang, Wang Yongsheng, Zhang Mingmin,. Scale effects on non-cavitation hydrodynamicsand noise of highly-skewed propeller in wake flow [J]. Journal of Southeast University (English Edition), 2013, 29 (2): 162-169. [doi:10.3969/j.issn.1003-7985.2013.02.010]
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Scale effects on non-cavitation hydrodynamicsand noise of highly-skewed propeller in wake flow(
)
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 29
- Issue:
- 2013 2
- Page:
- 162-169
- Research Field:
- Traffic and Transportation Engineering
- Publishing date:
- 2013-06-20
Info
- Title:
- Scale effects on non-cavitation hydrodynamicsand noise of highly-skewed propeller in wake flow
- Author(s):
- Yang Qiongfang1; Wang Yongsheng1; Zhang Mingmin2
-
1 College of Marine Power Engineering, Naval University of Engineering, Wuhan 430033, China
2College of Electronic Engineering, Naval University of Engineering, Wuhan 430033, China
- Keywords:
- highly skewed propeller; non-cavitation noise; scale effects; frequency domain; time domain
- PACS:
- U664.34
- DOI:
- 10.3969/j.issn.1003-7985.2013.02.010
- Abstract:
- Regarding the scale effects on propeller’s non-cavitation hydrodynamics and hydroacoustics, three similar 7-bladed highly-skewed propellers in the wake flow are addressed with diameters of 250, 500 and 1 000 mm, respectively. The discrete line-spectrum noise and its standardized spectrum level scaling law, together with the total sound pressure level are analyzed. The non-cavitation noise predictions are completed by both the frequency domain method and the time domain method. As a fluctuated noise source, the time-dependent fluctuated pressure and normal velocity distribution on propeller blades are obtained by the unsteady Reynolds-averaged Navier-Stokes(URANS)simulation. Results show that the pressure coefficient distribution of three propellers on the 0.7R section is nearly superposed under the same advance ratio. The periodic thrust fluctuation of three propellers can exactly reflect the tonal components of the axial passing frequency(APF)and the blade passing frequency(BPF), and the fluctuation enhancement from the small to the middle propeller at the BPF is greater than that from the middle to the big one. By the two noise prediction methods, the increment of the total sound pressure level from the small to the big propeller differs by 2.49 dB. Following the standardized scaling law, the spectrum curves of the middle and big propellers are nearly the same while significantly differing from the small one. The increment of both the line-spectrum level and the total sound pressure increases with the increase in diameter. It is suggested that the model scale of the propeller should be as large as possible in engineering to reduce the prediction error of the empirical scaling law and weaken the scale effects.
References:
[1] Seol H, Jung B, Suh J C, et al. Prediction of non-cavitation underwater propeller noise[J]. Journal of Sound and Vibration, 2002, 257(1): 131-156.
[2] Seol H, Suh J C, Lee S. Development of hybrid method for the prediction of underwater propeller noise[J]. Journal of Sound and Vibration, 2005, 288(2): 345-360.
[3] Seol H, Cheolsoo P. Numerical and experimental study on the marine propeller noise[C]//19th International Congress on Acoustics. Madrid, Spain, 2007: 1-4.
[4] Wagner C. Large-eddy simulation for acoustics [M]. New York: Cambridge University Press, 2007.
[5] Yang Qiongfang, Wang Yongsheng, Zeng Wende, et al. Calculation of highly-skewed propeller’s load noise using BEM numerical acoustic method in frequency domain [J]. Acta Armamentarii, 2011, 32(9): 1118-1125.(in Chinese)
[6] Caridi D. Industrial CFD simulation of aerodynamic noise[D]. Inedito: Università Degli Studi Di Napoli Federico Ⅱ, 2008.
[7] Yang Qiongfang, Wang Yongsheng, Wei Yinsan, et al. Non-cavitation noise prediction of highly-skewed propeller in wake flow by both time and frequency domain methods based on URANS simulation[C]//Proceedings of the 13th Ship and Submarine Underwater Noise Form. Wuxi, China, 2011: 325-338.
[8] Carley M. Time domain calculation of noise generated by a propeller in a flow [D]. Ireland: Department of Mechanical Engineering, Trinity College, 1996.
[9] Marretta R M A, Orlando C, Carley M. Adaptive BEM for low noise propeller design[J]. The Open Acoustics Journal, 2009, 2(1): 20-30.
[10] LMS International. Numerical acoustics [R]. LMS Virtual Lab, 2006.
[11] Kucukcoskun K. Prediction of free and scattered acoustic fields of low-speed fans[D]. Sint-Genesius-Role: Von Karman Institute for Fluid Dynamics, Avenue Guy de Collongue, 2012.
[12] Turkdogru N. Validity of the point source assumption of a rotor for far-field acoustic measurements with and without shielding[D]. Atlanta: School of Aerospace Engineering, Georgia Institute of Technology, 2010.
[13] Yang Qiongfang, Guo Wei, Wang Yongsheng, et al. Procedural realization of pre-operation in CFD prediction of propeller hydrodynamics[J]. Journal of Ship Mechanics, 2012, 16(4): 25-32.(in Chinese)
[14] Yang Qiongfang, Wang Yongsheng, Zhang Zhihong. Research on scale effects on propeller cavitating hydrodynamic and hydroacoustic performances with non-uniform inflow [J]. Chinese Journal of Mechanical Engineering, 2013, 26(2): 414-426.
[15] Yang Qiongfang, Wang Yongsheng, Zhang Mingmin. Propeller cavitation viscous simulation and low frequency noise prediction with non-uniform inflow[J]. Chinese Journal of Acoustics, 2013, 32(2): 1-19.
[16] Yang Qiongfang, Wang Yongsheng, Zhang Zhihong. Numerical simulation of tip vortex local flow of controllable pitch propeller [J]. Chinese Journal of Hydrodynamics, 2012, 27(2): 131-140.(in Chinese)
Memo
- Memo:
-
Biography: Yang Qiongfang(1984—), male, doctor, lecturer, yqfhaijun2008@126.com.
Foundation item: The National Natural Science Foundation of China(No.51009144).
Citation: Yang Qiongfang, Wang Yongsheng, Zhang Mingmin. Scale effects on non-cavitation hydrodynamics and noise of highly-skewed propeller in wake flow[J].Journal of Southeast University(English Edition), 2013, 29(2):162-169.[doi:10.3969/j.issn.1003-7985.2013.02.010]