Experimental Investigation on Cavitation Noise of Water Jet and its Chaotic Behaviour

Abstract:

The cavitation noise signals were collected separately for the cavitation nozzle and general nozzle at the target position and the nozzle exit in the condition of different standoff distance. The features of signal’s frequency spectrum and power spectrum were analyzed for different nozzles. Based on chaotic theory, phase space reconstruction was processed and the maximum Lyapunov exponent was calculated separately for each cavitation signal’s time series. Under the condition of this experiment, the difference between the general nozzle and cavitation nozzle was mostly marked at the target position while the standoff distance is 35 mm, which mainly displayed at the high frequency segment. The maximum Lyapunov exponent calculated appeared at standoff distance 35 mm. At the nozzle exit, the noise signal of cavitation nozzle is different from the general nozzle. The difference also displayed at the high frequency segment, and no changing with the standoff distance

• Periodical: Applied Mechanics and Materials (Volumes 121-126)
• Pages: 3919-3924
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.121-126.3919
• Online since: October 2011
• Authors: Feng Hua Zhang, Hai Feng Liu, Jun Chao Xu, Chuan Lin Tang
• Keywords: Cavitation, Chaos, Lyapunov Exponent, Nozzle, Water Jet

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