scholarly journals Discussion: “Critical Flow Velocities for Collapse of Reactor Parallel-Plate Fuel Assemblies” (Miller, D. R., 1960, ASME J. Eng. Power, 82, pp. 83–91)

1960 ◽  
Vol 82 (2) ◽  
pp. 91-92
Author(s):  
Irwin Beretsky
Keyword(s):  
Parallel Plate ◽  
Critical Flow ◽  
Fuel Assemblies ◽  
Flow Velocities

scholarly journals Critical Flow Velocities for Collapse of Reactor Parallel-Plate Fuel Assemblies

1960 ◽  
Vol 82 (2) ◽  
pp. 83-91 ◽  
Author(s):  
D. R. Miller
Keyword(s):  
Flow Velocity ◽  
Critical Velocity ◽  
Parallel Plate ◽  
Reactor Fuel ◽  
Critical Flow ◽  
Small Deflection ◽  
Fuel Assemblies ◽  
Flow Velocities

Theoretical formulas are presented for prediction of the flow velocity at which collapse occurs in long parallel-plate assemblies. Beyond the critical velocity the pressure-unbalance forces, developed as a consequence of a small deflection, exceed the corresponding elastic restraining forces, and the plates collapse. Both flat and curved-plate assemblies are considered, and the applicability of the formulas to design of reactor fuel-plate assemblies is discussed.

Characteristics of Fluidelastic Instability of Tube Rows in Crossflow

1988 ◽  
Vol 110 (1) ◽  
pp. 1-5
Author(s):  
S. S. Chen ◽  
J. A. Jendrzejczyk
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Diameter Ratio ◽  
Critical Flow ◽  
Jump Phenomenon ◽  
Tube Arrays ◽  
Fluidelastic Instability ◽  
Flow Velocities

An experimental study is reported that investigated the jump phenomenon in critical flow velocities for tube rows with different pitch-to-diameter ratios, and the excited and intrinsic instabilities for a tube row with a pitch-to-diameter ratio of 1.75. The experimental data provide additional insights into the instability phenomena of tube arrays in crossflow.

Instability Mechanisms and Stability Criteria of a Group of Circular Cylinders Subjected to Cross-Flow—Part 2: Numerical Results and Discussions

1983 ◽  
Vol 105 (2) ◽  
pp. 253-260 ◽  
Author(s):  
S. S. Chen
Keyword(s):  
Experimental Data ◽  
Cross Flow ◽  
Circular Cylinders ◽  
Critical Flow ◽  
Stability Criteria ◽  
Flow Part ◽  
Parameter Ranges ◽  
Square Array ◽  
Good Agreement ◽  
Flow Velocities

The fluid-force coefficients for a row of cylinders and a square array are determined from available experimental data and critical flow velocities are calculated as a function of system parameters. Experimental data for critical flow velocities are found to be in good agreement with the analytical results. It is concluded that different stability criteria have to be utilized in different parameter ranges because of different instability mechanisms.

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