Noise Reduction of Jet by Passive Control

Abstract:

This research focused on noise reduction in jets using chevron passive control method, the nozzle designs with varying chevron types were subjected to CFD analysis and experimental analysis to understand pressure distribution patterns in the far field. This research distinctively analysed chevron performance through pressure distribution in the far field and not based on nozzle acoustic power dis-tribution, a surface phenomenon. Four models of nozzles namely base, chevron, wave and tabular were designed, manufactured and extensive analysis in both computational and experimental approaches was carried out. The sound pressure level (SPL) was calculated along with its percentage reduction for three models by taking the base model as reference model. The scientific results showed that among all models, wave is the least noisy with reduction of 3.3% and 1.16% SPL in computation and experiment respectively. On the other hand, the base model found to be the highest noisy model both computationally and experimentally.

• Periodical: Applied Mechanics and Materials (Volume 935)
• Pages: 43-51
• DOI: https://doi.org/10.4028/p-Dc2Gup
• Online since: April 2026
• Authors: Felix Mwiya*, Lencho Dereje Futaza, Wisdom Simwila Kalunga, Abinash Rout, Dharmahinder Singh Chand, Yared Alemayehu, Prakash Jadhav
• Keywords: Chevron Nozzle, Decay Zone, Noise Reduction, Pressure

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