TRANSACTIONS OF THE KRYLOV STATE RESEARCH CENTRE

Science journal

 
ISSN (print) 2542-2324 /(online) 2618-8244


Articles of The Transactions of KSRC








Sawtooth trailing edges of propeller blades as high-frequency noise dampers



Full text article ( in russian)

Year

 
2019

Issue

 
390

Volume

 
4

Pages

 
137-150

Caption

 
Sawtooth trailing edges of propeller blades as high-frequency noise dampers

Authors

 
Yegorov Yu., Koval A.

Keywords

 
edge noise, acoustic measurements, marine propellers, model tests

DOI

 
10.24937/2542-2324-2019-4-390-137-150

Summary

 
Object and purpose of research. This paper explores the potential of sawtooth trailing edges in marine propeller designs, taking waterjet impeller as a case study.
Subject matter and methods.The study analyses a number of foreign publications on sawtooth trailing edge effect upon aeroacoustics of various object, derives principal ratios between geometric parameters of trailing edge that enable efficient damping of high-frequency noise and, last but not least, describes sonar stealth potential of sawtooth trailing edges.
Main results. Development and manufacturing of waterjet impeller model with saw-tooth blades. Cavitation, hydrodynamic and acoustic testing of the model.
Conclusion. Model tests have shown that sawtooth trailing edges can efficiently damp high-frequency noise of marine propeller, keeping their hydrodynamic and cavitation performance practically the same.

Back to the list



 





 
Login:
Password:
Register
Forgot your password?


Last issues

All rights reserved © Krylov state research centre, 2019


ISSN (print) 2542-2324 / ISSN (online) 2618-8244

Address: Moskovskoye shosse, 44, Saint-Petersburg, 196158

Phone: +7(812) 415-49-80