Unformatted text preview: surface rise with small rollers, known as a weak jump;
dissipation 5 to 15 percent. 2 1 (a) V1 y2 y1 V2 (b) (c) (d ) Fig. 10.12 Classification of hydraulic jumps: (a) Fr 1.0 to 1.7:
undular jumps; (b) Fr 1.7 to 2.5:
weak jump; (c) Fr 2.5 to 4.5: oscillating jump; (d) Fr 4.5 to 9.0:
steady jump; (e) Fr 9.0: strong
jump. (Adapted from Ref. 16.) | v v 679 | e-Text Main Menu (e) | Textbook Table of Contents | Study Guide 680 Chapter 10 Open-Channel Flow Fr1 Fr1 Fr1 2.5 to 4.5: Unstable, oscillating jump; each irregular pulsation creates a
large wave which can travel downstream for miles, damaging
earth banks and other structures. Not recommended for design
conditions. Dissipation 15 to 45 percent.
4.5 to 9.0: Stable, well-balanced, steady jump; best performance and action, insensitive to downstream conditions. Best design range.
Dissipation 45 to 70 percent.
Rough, somewhat intermittent strong jump, but good performance. Dissipation 70 to 85 percent. Further details can be found in Ref. 16 and Ref. 3, chap....
View Full Document
This note was uploaded on 10/27/2009 for the course MAE 101a taught by Professor Sakar during the Spring '08 term at UCSD.
- Spring '08