Cui, Yonggang and Lam, Wei Haur and Puay, How Tion and Ibrahim, Muhammad Shazril Idris and Robinson, Desmond and Hamill, Gerard (2020) Component velocities and turbulence intensities within ship twin-propeller jet using CFD and ADV. Journal of Marine Science and Engineering, 8 (12). ISSN 2077-1312, DOI https://doi.org/10.3390/jmse8121025.
Full text not available from this repository.Abstract
This study presents the decays of three components of velocity for a ship twin-propeller jet associated with turbulence intensities using the Acoustic Doppler Velocimetry (ADV) measurement and computational fluid dynamics (CFD) methods. Previous research has shown that a single-propeller jet consists of a zone of flow establishment and a zone of established flow. Twin-propeller jets are more complex than single-propeller jets, and can be divided into zones with four peaks, two peaks, and one peak. The axial velocity distribution is the main contributor and can be predicted using the Gaussian normal distribution. The axial velocity decay is described by linear equations using the maximum axial velocity in the efflux plane. The tangential and radial velocity decays show linear and nonlinear distributions in different zones. The turbulence intensity increases locally in the critical position of the noninterference zone and the interference zone. The current research converts the axial momentum theory of a single propeller into twin-propeller jet theory with a series of equations used to predict the overall twin-propeller jet structure.
| Item Type: | Article |
|---|---|
| Funders: | UNSPECIFIED |
| Uncontrolled Keywords: | twin-propeller; velocity decay; turbulence intensity; axial velocity; tangential velocity; radial velocity |
| Subjects: | T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Faculty of Engineering Faculty of Engineering > Department of Civil Engineering |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 29 Nov 2023 02:27 |
| Last Modified: | 29 Nov 2023 04:36 |
| URI: | http://eprints.um.edu.my/id/eprint/36207 |
Actions (login required)
 |
View Item |
