Chapt10

# 5hmax1 cos 2 xl to compute conditions a at the crest

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 10.113 P10.114 Investigate the possibility of choking in the venturi flume of Fig. P10.113. Let b1 4 ft, b2 3 ft, and y1 2 ft. Compute the values of y2 and V1 for a flow rate of (a) 30 ft3/s and (b) 35 ft3/s. Explain your vexation. P10.115 Gradually varied theory, Eq. (10.49), neglects the effect of width changes, db/dx, assuming that they are small. But they are not small for a short, sharp contraction such as the venturi flume in Fig. P10.113. Show that, for a rectangular section with b b(x), Eq. (10.49) should be modified as follows: dy dx S0 Textbook Table of Contents [V2/(gb)](db/dx) 1 Fr2 S | Study Guide Problems 705 Investigate a criterion for reducing this relation to Eq. (10.49). P10.116 Investigate the possibility of frictional effects in the venturi flume of Prob. 10.113, part (a), for which the frictionless solution is Q 9.88 m3/s. Let the contraction be 3 m long and the measurements of y1 and y2 be at positions 3 m upstream and 3 m downstream of the contraction, respectively. Use the modified gradually varied...
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.

Ask a homework question - tutors are online