NDLI: Flow range enhancement by secondary flow effect in low solidity circular cascade diffusers

Content Provider	Springer Nature Link
Author	Sakaguchi, Daisaku Tun, Min Thaw Mizokoshi, Kanata Kishikawa, Daiki
Copyright Year	2014
Abstract	High-pressure ratio and wide operating range are highly required for compressors and blowers. The technical issue of the design is achievement of suppression of flow separation at small flow rate without deteriorating the efficiency at design flow rate. A numerical simulation is very effective in design procedure, however, cost of the numerical simulation is generally high during the practical design process, and it is difficult to confirm the optimal design which is combined with many parameters. A multi-objective optimization technique is the idea that has been proposed for solving the problem in practical design process. In this study, a Low Solidity circular cascade Diffuser (LSD) in a centrifugal blower is successfully designed by means of multi-objective optimization technique. An optimization code with a meta-model assisted evolutionary algorithm is used with a commercial CFD code ANSYS-CFX. The optimization is aiming at improving the static pressure coefficient at design point and at low flow rate condition while constraining the slope of the lift coefficient curve. Moreover, a small tip clearance of the LSD blade was applied in order to activate and to stabilize the secondary flow effect at small flow rate condition. The optimized LSD blade has an extended operating range of 114 % towards smaller flow rate as compared to the baseline design without deteriorating the diffuser pressure recovery at design point. The diffuser pressure rise and operating flow range of the optimized LSD blade are experimentally verified by overall performance test. The detailed flow in the diffuser is also confirmed by means of a Particle Image Velocimeter. Secondary flow is clearly captured by PIV and it spreads to the whole area of LSD blade pitch. It is found that the optimized LSD blade shows good improvement of the blade loading in the whole operating range, while at small flow rate the flow separation on the LSD blade has been successfully suppressed by the secondary flow effect.
Starting Page	391
Ending Page	400
Page Count	10
File Format	PDF
ISSN	10032169
Journal	Journal of Thermal Science
Volume Number	23
Issue Number	4
e-ISSN	1993033X
Language	English
Publisher	Science Press
Publisher Date	2014-07-18
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Low solidity circular cascade diffuser Multi-objective optimization flow Flow range enhancement Classical Continuum Physics Engineering Fluid Dynamics Engineering Thermodynamics, Heat and Mass Transfer
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics

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

Control of secondary flow in a low solidity circular cascade diffuser

Noise characteristics of centrifugal blower with low solidity cascade diffuser (Noise reduction by means of small groove located at LSD blade leading tip)

Effect of diffuser vane shape on the performance of a centrifugal compressor stage

Application of pressure sensitive paint measurement to a low-solidity cascade diffuser of a transonic centrifugal compressor

Boundary layer separation control on a highly-loaded, low-solidity compressor cascade

Low-Solidity Tandem-Cascade Diffusers for Wide-Flow-Range Centrifugal Blowers

Effect of high negative incidence on the performance of a centrifugal compressor stage with conventional vaned diffusers

Application of Low-Solidity Cascade Diffuser to Transonic Centrifugal Compressor

Application of a Low-Solidity Cascade Diffuser to Transonic Centrifugal Compressor

Flow range enhancement by secondary flow effect in low solidity circular cascade diffusers

Similar Documents

Control of secondary flow in a low solidity circular cascade diffuser

Noise characteristics of centrifugal blower with low solidity cascade diffuser (Noise reduction by means of small groove located at LSD blade leading tip)

Effect of diffuser vane shape on the performance of a centrifugal compressor stage

Application of pressure sensitive paint measurement to a low-solidity cascade diffuser of a transonic centrifugal compressor

Boundary layer separation control on a highly-loaded, low-solidity compressor cascade

Low-Solidity Tandem-Cascade Diffusers for Wide-Flow-Range Centrifugal Blowers

Effect of high negative incidence on the performance of a centrifugal compressor stage with conventional vaned diffusers

Application of Low-Solidity Cascade Diffuser to Transonic Centrifugal Compressor

Application of a Low-Solidity Cascade Diffuser to Transonic Centrifugal Compressor

Flow range enhancement by secondary flow effect in low solidity circular cascade diffusers