摘要:

AbstractWater-hammer theory is extended to the fuel assembly configuration of concentric annular fuel elements and flow passages. The analysis shows that due to the coupling of the hydraulic effects in adjacent coolant passages to each other through an elastic structure separating them, several modes of pressure wave propagation are possible. These compression (and rarefaction) waves travel at velocities less than the velocity of sound in the fluid depending on the dimensions of the fuel elements and flow passages. The existence of these compression and rarefaction waves traveling at different velocities leads to complex pressure disturbance patterns as a function of time, which may be of importance in fatigue analysis of the structure or possibly in determining whether or not voids could form as a result of the rarefaction waves. The analysis is general enough that it can be extended to include a wide variety of configurations when it is desirous to evaluate the effect of hydraulic pressure waves on fuel element performance.

ISSN:0029-5639    

DOI:10.13182/NSE69-A21120

出版商:Taylor&Francis    

年代:1969

数据来源: Taylor

摘要:

AbstractThree types of experiments were conducted in a study of flow-induced vibration of cylinders: 1) experiments with a single cylinder in the test section, in which the length, mass, flexural rigidity, and diameter of the cylinder, and the flow velocity were varied systematically, in order to obtain a measure of the dependence of vibration amplitude on these parameters; 2)ad hocexperiments with single cylinders on the effect of large-scale flow disturbances upstream of the cylinder; 3) experiments with a bundle of cylinders.Based on the work of 1), a previously derived empirical expression for predicting vibration amplitude was revised, and agreement with the experimental data from various sources was improved; however, agreement with the experiments of 3) remains poor.

ISSN:0029-5639    

DOI:10.13182/NSE69-A21121

出版商:Taylor&Francis    

年代:1969

数据来源: Taylor

ISSN:0029-5639    

DOI:10.13182/NSE69-A21122

出版商:Taylor&Francis    

年代:1969

数据来源: Taylor

ISSN:0029-5639    

DOI:10.13182/NSE69-A21123

出版商:Taylor&Francis    

年代:1969

数据来源: Taylor

ISSN:0029-5639    

DOI:10.13182/NSE69-A21124

出版商:Taylor&Francis    

年代:1969

数据来源: Taylor

ISSN:0029-5639    

DOI:10.13182/NSE69-A21125

出版商:Taylor&Francis    

年代:1969

数据来源: Taylor

ISSN:0029-5639    

DOI:10.13182/NSE69-A21126

出版商:Taylor&Francis    

年代:1969

数据来源: Taylor

ISSN:0029-5639    

DOI:10.13182/NSE69-A21127

出版商:Taylor&Francis    

年代:1969

数据来源: Taylor

ISSN:0029-5639    

DOI:10.13182/NSE69-A21128

出版商:Taylor&Francis    

年代:1969

数据来源: Taylor