NDLI: Erosion Characteristics and the Corresponding Self-Resonating Oscillations of Cavitating Jet on Oblique Surfaces

Please wait, while we are loading the content...

Erosion Characteristics and the Corresponding Self-Resonating Oscillations of Cavitating Jet on Oblique Surfaces

Content Provider	MDPI
Author	BoShen, Liu Ma, Fei
Copyright Year	2020
Abstract	The erosion and the corresponding self-resonating oscillations of the cavitating jet were experimentally investigated on the oblique surfaces. To evaluate the intensities of erosion and self-resonating oscillations of the jet, mass loss, surface morphology of the eroded specimens, upstream fluctuating pressure and unsteady cavitation noise were obtained at a series of stand-off distance ratios $l_{d} / d_{t}$ in the cases where the oblique angles are $α$ = 0°, 5°, 15° and 30°. In the low $l_{d} / d_{t}$ range, with the increase of $α$ , the erosion gradually transforms from two isolated circular erosion rings at $α$ = 0° into irregular oval shaped rings at $α$ = 5° and separated horseshoe shaped rings at $α$ = 15°. The self-resonating oscillations and cavitation were weak in this range because the dominating frequency $f_{0}$ is away from the design frequency of the organ-pipe nozzle, resulting in the depressed aggressive ability in the low $l_{d} / d_{t}$ range. With increasing $l_{d} / d_{t}$ , the cavitation is enhanced before the self-resonating oscillations achieving more energy. The spectral decomposition reveals the existence of an intermediate state at the optimum standoff distance, where the energy of self-resonating oscillations and the cavitation reach a balance to realize the severest erosion damage.
Starting Page	2563
e-ISSN	19961073
DOI	10.3390/en13102563
Journal	Energies
Issue Number	10
Volume Number	13
Language	English
Publisher	MDPI
Publisher Date	2020-05-18
Access Restriction	Open
Subject Keyword	Energies Aerospace Engineering Cavitating Waterjet Erosion Self-resonating Oscillations
Content Type	Text
Resource Type	Article

Central Library (ISO-9001:2015 Certified)
Indian Institute of Technology Kharagpur
Kharagpur, West Bengal, India | PIN - 721302

See location in the Map
03222 282435
Mail: support@ndl.gov.in

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in