摘要:

The paper presents the results of an experimental investigation on the behaviour of Von-Kármán coefficient in sediment laden flow in straight and in curved reaches of smooth rectangular rigid boundary open channels. The investigation shows the effect of varying the Reynolds number of sediment laden flow, the suspended sediment concentration in the flow, the radius-breadth ratio of the channel, and the central angle of the bend.

ISSN:0022-1686    

DOI:10.1080/00221688909499125

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

All important sediment transport formulas have an empirical approach. This paper presents analytical solutions which enable us to predict the transport of sediments: A total sediment load equation is developed, based on balance power. The equations are relatively simple and the procedure for calculation has been facilitated by means of graphs. Shield's and Duboys' formulas were obtained from the concepts established by deducing the proposed equation; also, a formula similar to those of Yang's unit stream is deduced. A comparison with the data from several flumes and rivers indicates that the proposed equations are accurate.

ISSN:0022-1686    

DOI:10.1080/00221688909499126

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Cavitation erosion damage to spillway surfaces may be prevented with the use of aeration devices (aerators), introducing air in the layers close to the channel bottom.

ISSN:0022-1686    

DOI:10.1080/00221688909499127

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

After a theoretical analysis of system singularities, and normalized equations describing the water-level motion in the throttled surge tank of a hydropower plant are solved on a digital computer. The critical stability conditions for large amplitude oscillations are obtained by finding the conditions under which the initial state point of the system is, in the terminology of the phase plane method, on the limit cycle. The paper demonstrates the possibility of the existence of 2 limit cycles around the singularity representing the steady operating point and the feasibility of the adoption of surge tanks with a section smaller than Thoma critical value.

ISSN:0022-1686    

DOI:10.1080/00221688909499128

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0022-1686    

DOI:10.1080/00221688909499129

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0022-1686    

DOI:10.1080/00221688909499130

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0022-1686    

DOI:10.1080/00221688909499131

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0022-1686    

DOI:10.1080/00221688909499124

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor