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http://dx.doi.org/10.5050/KSNVE.2015.25.2.75

Prediction of Non-cavitation Noise from Large Scale Marine Propeller  

Ryu, Ki-Wahn (Dpt. Aerospace Engineering, Chonbuk National University)
Lee, Jong-Yeol (Chonbuk National University)
Kim, Bong-Ki (Korea Institute of Machinery & Materials)
Byun, Jeong-Woo (Hyundai Heavy Industries)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.25, no.2, 2015 , pp. 75-82 More about this Journal
Abstract
Noises from the large scale marine propeller are calculated numerically on non-cavitation condition. The hydrodynamic analysis is carried out by potential based panel method with time marching free wake approach. The distribution of hydrodynamic loads on the propeller surface and noise signals are obtained using the unsteady Bernoulli's equation and the Farasssat's formula respectively. It turns out that the noise signal at the narrow band shows strong peak at the blade passage frequency, and the peak value at the 1/3 octave band also shows the same trend. Noise signals and directivity patterns for both the thickness and the loading noise are compared with each other. The directivity pattern for the loading noise shows minor lobe at the backward side of the rotating disc plane.
Keywords
Propeller; Panel Method; Acoustic Analogy; Non-cavitation Noise; Thickness Noise; Loading Noise; Directivity Pattern;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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