Change search
ReferencesLink to record
Permanent link

Direct link
Numerical Study on Optimizing Impinging Orifice Array on a Convex Cylindrical Surface
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology. Eindhoven University of Technology.
2014 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The impinging solar receiver, bearing the merits of high heat transfer coefficient and compact structure, has a great potential in the field of solar dish Brayton system. Despite the wide application of cylindrical structure in the impinging solar receiver, the research on orifice array optimization against curvature surfaces is rare.In this paper, the main objective is to study the heat transfer and pressure drop characteristics of an orifice impinging array under a constant mass flow rate and a constant surface temperature boundary condition for the future impinging receiver design. Various orifice shapes were studied via numerical tools (Ansys Fluent 14.0) and their performances in both pressure drop and heat transfer coefficient were compared. The upstream fillet orifice was found to have the lowest pressure drop with moderate compromise in heat transfer coefficient. Moreover, a mathematical optimization model, based on empirical correlations, was developed for the orifice impinging array on the convex cylindrical surfaces. This model can provide an appropriate range of orifice number and orifice diameter, from which the key factors of the array including the ratio of height and orifice diameter H/D, orifice interval, number of orifices in each tier circumferential and tier numbers can be calculated. Several validation cases were also conducted by Ansys Fluent.

Place, publisher, year, edition, pages
Keyword [en]
Impingement; Numerical heat transfer; Orifice shape; Orifice array optimization
National Category
Energy Engineering
URN: urn:nbn:se:kth:diva-149954OAI: diva2:741774
2014-08-26, HPT Library, Stockholm, 08:46 (English)
Available from: 2014-09-01 Created: 2014-08-29 Last updated: 2014-09-01Bibliographically approved

Open Access in DiVA

fulltext(3295 kB)363 downloads
File information
File name FULLTEXT01.pdfFile size 3295 kBChecksum SHA-512
Type fulltextMimetype application/pdf

By organisation
Heat and Power Technology
Energy Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 363 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 136 hits
ReferencesLink to record
Permanent link

Direct link