Preprint Article Version 1 This version is not peer-reviewed

Effect of Block Geometry and Divergence of Baffled Chute on Downstream Scour Pattern

Version 1 : Received: 18 July 2019 / Approved: 19 July 2019 / Online: 19 July 2019 (10:15:33 CEST)

How to cite: karimi Chahartaghi, M.; Nazari, S.; Solimani Babarsad, M. Effect of Block Geometry and Divergence of Baffled Chute on Downstream Scour Pattern. Preprints 2019, 2019070223 (doi: 10.20944/preprints201907.0223.v1). karimi Chahartaghi, M.; Nazari, S.; Solimani Babarsad, M. Effect of Block Geometry and Divergence of Baffled Chute on Downstream Scour Pattern. Preprints 2019, 2019070223 (doi: 10.20944/preprints201907.0223.v1).

Abstract

The effect of divergence of chute sidewalls with three different baffle block geometries namely USBR, trihedral and semicircular blocks, as well as the depth and dimensions of the scour hole downstream of the chute were studied using a physical model. For this purpose, 9 models of baffled chutes were designed and constructed with divergence ratios of 1.45, 1.75, and 2.45 and without divergence (with a divergence ratio of 1). Comparing the results on the effect of block geometry at different divergence ratios revealed that the use of blocks proposed in this study instead of standard USBR blocks reduced the mean and maximum scour hole by 50%. For a given block geometry, the mean depth, maximum depth, and length of scour hole were reduced by 75%, 58%, and 50%, respectively.

Subject Areas

Physical model; chute structure; scour hole; divergence; downstream

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