Extreme Pressures in Hydraulic‐Jump Stilling Basins

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Abstract
The hydraulic jump is a fascinating subject that has been the subject of several hundred technical papers. The study reported herein, sponsored by the National Science Foundation, provides information on extreme pressures in the hydraulic jump, an area that has not received sufficient coverage in earlier work. Data are presented for Froude numbers from 3–10, with both developed and undeveloped incident flow, test runs up to 24 hr in length, chute slopes of 0°, 15°, 30°, and 45°, jump locations on the chute as well as at the toe of the chute, and with and without chute blocks, intermediate blocks, and end sills. Peak values of RMS dimensionless pressure fluctuations Cp' up to 0.10 and dimensionless pressure fluctuation Cp‐values up to 1.3 were obtained. The peak value of Cp depended on location in the jump, chute slope, incident Froude number, incident flow development, and the length of test run. Brief data on areal coverage of pulses are also included. The normal distribution did not conform to extreme pressures.

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