with Rg defined by eqiiatlon (7-46). 



Table 7-5. Experimentally determined values of C 



■M 



Range or mean ± standard deviation. 



The values of C^ given in Table 7-5 show that Skjelbreia (1960), Dean 

 and Aagaard (1970), and Evans (1970) used almost the same experimental data, 

 and yet estimated different values of C^ . The same applies to their 

 determination of C^ , but while the recommended choice of C^ from Figure 7- 

 85 is generally conservative, from equation (7-53) the recommended choice of 

 Qy, for R > 5 X 10 corresponds approximately to the average of the 



reported values. This possible lack of conservatism, however, is not 



significant since the inertia force component is generally smaller than the 

 drag force component for design conditions. From equations (7-37) and (7-38) 

 the ratio of maximum inertia force to maximum drag force becomes 



^m 



'Dm 



TT % D ^im 

 2 ^Z? " ^Dm 



(7-54) 



7-145 



