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Draft Tubes of Water Turbines in Underground and Semi-Underground Powerhouses

Mikhailov, I. E.

The effect of the centerline radius, bend angle, and diffuser length of high draft tubes in underground and semi-underground powerhouses on head losses is studied analytically. It is established that the dependence of the head losses on the diffuser length does not depend on the capacity, flow rate, and runner diameter of the water turbine; therefore, the diffuser length should be consistent with the construction conditions, but no greater than 35 – 40 m. The centerline radius r0 of the elbow increases with its bend angle α.

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Draft Tubes of Water Turbines in Underground and Semi-Underground Powerhouses

Mikhailov, I. E.

The effect of the centerline radius, bend angle, and diffuser length of high draft tubes in underground and semi-underground powerhouses on head losses is studied analytically. It is established that the dependence of the head losses on the diffuser length does not depend on the capacity, flow rate, and runner diameter of the water turbine; therefore, the diffuser length should be consistent with the construction conditions, but no greater than 35 – 40 m. The centerline radius r0 of the elbow increases with its bend angle α.

Draft Tubes of Water Turbines in Underground and Semi-Underground Powerhouses

Mikhailov, I. E.

The effect of the centerline radius, bend angle, and diffuser length of high draft tubes in underground and semi-underground powerhouses on head losses is studied analytically. It is established that the dependence of the head losses on the diffuser length does not depend on the capacity, flow rate, and runner diameter of the water turbine; therefore, the diffuser length should be consistent with the construction conditions, but no greater than 35 – 40 m. The centerline radius r0 of the elbow increases with its bend angle α.

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Title:

Draft Tubes of Water Turbines in Underground and Semi-Underground Powerhouses

Contributors:

Mikhailov, I. E. (author)

Published in:

Power Technology and Engineering ; 52

Publication date:

2018

ISSN:

DOI:

https://doi.org/10.1007/s10749-018-0930-4

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

diffuser , cone , head loss , high draft tube , elbow

Classification:

BKL: 56.30 Wasserbau / 56.30$jWasserbau

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