scholarly journals Experimental investigation on the combined effect of dowel misalignment and cyclic wheel loading on dowel bar performance in JPCP

2018 ◽  
Vol 174 ◽  
pp. 256-266 ◽  
Author(s):  
Basim H. Al-Humeidawi ◽  
Parthasarathi Mandal
Keyword(s):  
Experimental Investigation ◽  
Combined Effect ◽  
Wheel Loading ◽  
Dowel Bar

An Attempt to Uncouple the Effect of Coriolis and Buoyancy Forces Experimentally on Heat Transfer in Smooth Circular Tubes That Rotate in the Orthogonal Mode

1992 ◽  
Vol 114 (4) ◽  
pp. 858-864 ◽  
Author(s):  
W. D. Morris ◽  
R. Salemi
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Experimental Investigation ◽  
Circular Tube ◽  
Leading Edge ◽  
Combined Effect ◽  
Enhanced Heat Transfer ◽  
Coriolis Forces ◽  
Circular Tubes ◽  
Buoyancy Forces

This paper reports the results of an experimental investigation of the combined effect of Coriolis and buoyancy forces enforced convection in a circular tube that rotates about an axis orthogonal to its centerline. The experiment has been deliberately designed to minimize the effect of circumferential conduction in the tube walls by using material of relatively low thermal conductivity. A new correlating parameter for uncoupling the effect of Coriolis forces from centripetal buoyancy is proposed for the trailing and leading edges of the tube. It is demonstrated that enhanced heat transfer on the trailing edge occurs as a result of rotation. On the leading edge significant reductions in heat transfer compared to the zero rotation case can occur, but with possible recovery at high rotational speeds.

The Performance of Two Butterfly Valves Mounted in Series

1991 ◽  
Vol 113 (3) ◽  
pp. 419-423 ◽  
Author(s):  
M. J. Morris ◽  
J. C. Dutton
Keyword(s):  
Experimental Investigation ◽  
Pressure Drop ◽  
System Performance ◽  
Combined Effect ◽  
Operating Characteristics ◽  
Dimensionless Pressure ◽  
Mass Flowrate ◽  
In Series ◽  
Torque Coefficient ◽  
Aerodynamic Torque

The results of an experimental investigation concerning the operating characteristics of two similar butterfly valves mounted in series are reported. Emphasis is given to the influence of the upstream valve disk angle, the downstream valve disk angle, the relative valve orientation, and the spacing between the valves. The dimensionless pressure drop, the mass flowrate coefficient, and the aerodynamic torque coefficient of each valve are used to characterize the system performance. The results show that the operating characteristics are strongly tied to the combined effect of the two valve disk angles. With noted exceptions, the valve disk orientation and spacing are secondary influences.

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