Bend losses in rectangular culverts.

Malone, Travis R; Parr, A David; University of Kansas; Kansas. Dept. of Transportation

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ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.

i

Bend losses in rectangular culverts.

2008-09-01
By Malone, Travis R ; Parr, A David

English

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Details:

Creators:

Malone, Travis R ; Parr, A David

Malone, Travis R ; Parr, A David Less -
Corporate Creators:

University of Kansas ; Kansas. Dept. of Transportation

University of Kansas ; Kansas. Dept. of Transportation Less -
Subject/TRT Terms:

[+]

Channel Bends Channel Flow Culverts Hydraulics Loss Of Material
Publication/ Report Number:

K-TRAN: KU-05-5 ; RE-0378-1

K-TRAN: KU-05-5 ; RE-0378-1 Less -
Resource Type:

Tech Report
Geographical Coverage:

Kansas
Edition:

Final report
Corporate Publisher:

Kansas. Dept. of Transportation
Abstract:

This study investigated bend losses for open channel flow in rectangular channels or culverts. Laboratory experiments were performed for sub-critical flow in rectangular channels with abrupt bends. Bend angles of approximately 30, 45, 60, 75 and 90 degrees were tested. The experimental results were expressed as empirical equations, charts and tables relating the bend loss coefficient to the bend angle. The velocity and depth are at a location sufficiently downstream from the bend to allow the flow to return to gradually varied. A procedure was developed to estimate head loss for gradual bends in rectangular channels flowing as free surface flow. The bend loss coefficients for gradual bends in conduits flowing full were used to develop an adjustment factor. This factor was used to estimate a gradual bend loss coefficient for free surface flow in rectangular channels. The equation used to estimate the gradual bend loss coefficient was where is the abrupt bend loss coefficient, as defined in this study. Example problems were presented illustrating the computation of bend loss for both an abrupt bend and a gradual bend in a rectangular open channel.
Format:

PDF
Funding:

C1475
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:e4edd479ffd40e8915b1a6f40e1a045961dc4d959747b9a268eae26754c2c80e
Download URL:

https://rosap.ntl.bts.gov/view/dot/16654/dot_16654_DS1.pdf
File Type:

[PDF-1.14 MB]