On Cross-Flow Fan Similarity: Effects of Casing Shape-Reference-Cited by-同舟云学术

On Cross-Flow Fan Similarity: Effects of Casing Shape

Published:2001-03-15 Issue:3 Volume:123 Page:523-531
ISSN:0098-2202
Container-title:Journal of Fluids Engineering
language:en
Short-container-title:

Author:

Lazzarotto L.¹,Lazzaretto A.¹,Martegani A. D.¹,Macor A.²

Affiliation:

1. Department of Mechanical Engineering, University of Padova, via Venezia, 1 35131 Padova, Italy

2. Department of Management and Engineering, University of Padova, Stradella s. Nicola, 3 36100 Vicenza, Italy

Abstract

The limited number of experimental investigations on similarity operation in the literature is not sufficient to state the validity of similarity laws for cross-flow fans. This is also due to the operating conditions occurring in practical applications, where the values of impeller size and rotational speed generally result in low Reynolds numbers and, then, in a non-negligible influence of viscous forces on performance. The analysis is further complicated by the high influence of the casing shape on performance, which can lead to induced effects on similarity operation. An experimental test program is presented in this paper, aimed at understanding the influence of Reynolds number on performance for different casing shapes. Five impellers having similar shape and different dimensions were tested, each one matched with five casings at different rotational speed. The results show that similarity laws can be applied with good approximation above critical blade Reynolds numbers of around 4000 to 15,000, depending on the geometrical characteristics of the casing. The strong scale effect, shown by some authors in the literature, is not observed in these tests.

Publisher

ASME International

Subject

Mechanical Engineering

Link

http://asmedigitalcollection.asme.org/fluidsengineering/article-pdf/123/3/523/5760396/523_1.pdf

Reference15 articles.

1. Ilberg, H., and Sadeh, W. Z., 1965–66, “Flow Theory and Performance of Tangential Fans,” Proc. Instn. Mech. Engrs., Vol. 180, Part 1, No 19.

2. Eck, B. 1973, Fans, Pergamon Press, New York.

3. Lajos, T., and Preszler, L., 1973, “On the Cross Flow Fan Theory. Part 1: Types of Fans, Operating Principles, Stream Configuration, Velocity Field (In German),” Heizung-Lu¨ftung-Haustechnik, 24 Nr. 5.

4. Lajos, T., and Preszler, L., 1973, “On the Cross Flow Fan Theory. Part 2: Calculation of the Blade Circulation and the Flow Field, and Comparison of the Experimental Results With the Theory,” (in German). Heizung-Lu¨ftung-Haustechnik, 24 Nr. 6.

5. Lajos, T., 1975, “Investigation of the Flow Characteristics in the Impeller of the Tangential Fan,” Proceedings of Sixth Conference on Fluid Machinery, Budapest.

Cited by 30 articles. 订阅此论文施引文献订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献

1. Straw movement and flow field in a crushing device based on CFD-DEM coupling with flexible hollow straw model;Biosystems Engineering;2024-06

2. Development of cleaning systems for combine harvesters: A review;Biosystems Engineering;2023-12

3. Performance and Efficiency of Cross-Flow Fans—A Review;Energies;2023-11-27

4. Comparative Evaluation of High-Speed Bearingless Cross-Flow Fan Designs for Lithography Excimer Lasers;Machines;2023-06-02

5. Towards an Accurate Aerodynamic Performance Analysis Methodology of Cross-Flow Fans;Energies;2022-07-14