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Experimental Study of Pressure Loss in a 5 × 5–Rod Bundle With the Mixing Vane Spacer Grid

Qu, Wenhai; Yao, Weiyi; Xiong, Jinbiao; Cheng, Xu 1
1 Fakultät für Maschinenbau – Institut für Fusionstechnologie und Reaktortechnik (IFRT), Karlsruher Institut für Technologie (KIT)


Axial and lateral pressure loss in a 5 × 5 rod–bundle with a split-type mixing vane spacer grid was experimentally measured using differential pressure transmitters at different sub-channel Reynolds numbers (Re) and orienting angles. The geometrical parameters of the 5 × 5–rod bundle are as follows: they have the same diameter (D = 9.5 mm) and pitch (p = 12.6 mm) as those of real fuel rods of a typical pressurized water reactor (PWR), with a sub-channel hydraulic diameter (D$_{h}$) of 11.78 mm. The characteristics and resistance models of pressure loss are discussed. The main axial pressure loss is caused by the spacer grid, and the spacer grid generates additional wall friction pressure loss downstream of the spacer grid. The lateral pressure loss shows strong correlations with orienting angles and distance from the spacer grid. The lateral pressure loss shows a sudden burst in the mixing vanes region and a slight augmentation at z = 3D$_{h}$. After 3D$_{h}$, the lateral pressure loss decays in an exponential way with distance from the spacer grid, and it becomes constant quickly at z = 20D$_{h}$.

Verlagsausgabe §
DOI: 10.5445/IR/1000135664
Veröffentlicht am 20.07.2021
DOI: 10.3389/fenrg.2021.675494
Zitationen: 6
Web of Science
Zitationen: 4
Zitationen: 9
Cover der Publikation
Zugehörige Institution(en) am KIT Fakultät für Maschinenbau – Institut für Fusionstechnologie und Reaktortechnik (IFRT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2296-598X
KITopen-ID: 1000135664
Erschienen in Frontiers in energy research
Verlag Frontiers Media SA
Band 9
Seiten Art.-Nr.: 675494
Vorab online veröffentlicht am 09.06.2021
Schlagwörter pressure loss, resistance model development, rod bundle assembly, spacer grid, sliding pressure loss measurement
Nachgewiesen in Scopus
Web of Science
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