Effects of Rotation and Stratification: An Introduction

2017 ◽  
pp. 1-24
Author(s):  
GertJan F. van Heijst
Keyword(s):  
Effects Of Rotation

Modeling Vibration-Induced Tire-Pavement Interaction Noise in the Mid-frequency Range

2020 ◽  
Author(s):  
Sterling McBride ◽  
Ricardo Burdisso ◽  
Corina Sandu
Keyword(s):  
Sound Intensity ◽  
Element Model ◽  
Dominant Frequency ◽  
Contact Forces ◽  
Surface Velocity ◽  
New Wave ◽  
Normal Surface ◽  
Radiated Noise ◽  
Physical Effects ◽  
Effects Of Rotation

ABSTRACT Tire-pavement interaction noise (TPIN) is one of the main sources of exterior noise produced by vehicles traveling at greater than 50 kph. The dominant frequency content is typically within 500–1500 Hz. Structural tire vibrations are among the principal TPIN mechanisms. In this work, the structure of the tire is modeled and a new wave propagation solution to find its response is proposed. Multiple physical effects are accounted for in the formulation. In an effort to analyze the effects of curvature, a flat plate and a cylindrical shell model are presented. Orthotropic and nonuniform structural properties along the tire's transversal direction are included to account for differences between its sidewalls and belt. Finally, the effects of rotation and inflation pressure are also included in the formulation. Modeled frequency response functions are analyzed and validated. In addition, a new frequency-domain formulation is presented for the computation of input tread pattern contact forces. Finally, the rolling tire's normal surface velocity response is coupled with a boundary element model to demonstrate the radiated noise at the leading and trailing edge locations. These results are then compared with experimental data measured with an on-board sound intensity system.

Effects of Rotation on Blade Surface Heat Transfer: An Experimental Investigation

1997 ◽  
Author(s):  
Roger W. Moss ◽  
Roger W. Ainsworth ◽  
Tom Garside
Keyword(s):  
Thin Film ◽  
Heat Transfer ◽  
Experimental Investigation ◽  
Turbine Blade ◽  
Time History ◽  
Surface Heat ◽  
Blade Surface ◽  
Surface Heat Transfer ◽  
Effects Of Rotation ◽  
Wake Passing

Measurements of turbine blade surface heat transfer in a transient rotor facility are compared with predictions and equivalent cascade data. The rotating measurements involved both forwards and reverse rotation (wake free) experiments. The use of thin-film gauges in the Oxford Rotor Facility provides both time-mean heat transfer levels and the unsteady time history. The time-mean level is not significantly affected by turbulence in the wake; this contrasts with the cascade response to freestream turbulence and simulated wake passing. Heat transfer predictions show the extent to which such phenomena are successfully modelled by a time-steady code. The accurate prediction of transition is seen to be crucial if useful predictions are to be obtained.

Effects of rotation discipline on medical student grades in obstetrics and gynecology throughout the academic year

1993 ◽  
Vol 169 (5) ◽  
pp. 1215-1217 ◽  
Author(s):  
Alberto Manetta ◽  
Edward Manetta ◽  
Dennis Emma ◽  
K.A. Keegan ◽  
J.H. Williams
Keyword(s):  
Medical Student ◽  
Obstetrics And Gynecology ◽  
Effects Of Rotation ◽  
Student Grades ◽  
Academic Year

Effects of rotation and ion incidence angle on sputter depth resolution in thin films of NiFe/Ta

1992 ◽  
Vol 19 (1-12) ◽  
pp. 55-59 ◽  
Author(s):  
Matthias M. Henneberg ◽  
Daryl J. Pocker ◽  
Michael A. Parker
Keyword(s):  
Thin Films ◽  
Incidence Angle ◽  
Depth Resolution ◽  
Effects Of Rotation

Effects of Rotation on Ideal Ballooning Modes

1994 ◽  
Vol 34 (2-3) ◽  
pp. 265-270
Author(s):  
S. Sen
Keyword(s):  
Effects Of Rotation

Some effects of rotation rate on planetary ? scale wave flows

1996 ◽  
Vol 55 (1-4) ◽  
pp. 199-210
Author(s):  
G. -Q. Li ◽  
R. Kung ◽  
R. L. Pfeffer
Keyword(s):  
Rotation Rate ◽  
Planetary Scale ◽  
Effects Of Rotation ◽  
Wave Flows

Modified Moore–Gibson–Thompson photo-thermoelastic model for a rotating semiconductor half-space subjected to a magnetic field

2021 ◽  
pp. 2150163
Author(s):  
A. E. Abouelregal ◽  
Hijaz Ahmad ◽  
S. K. Elagan ◽  
Nawal A. Alshehri
Keyword(s):  
Magnetic Field ◽  
Half Space ◽  
Plasma Waves ◽  
Angular Speed ◽  
Semiconducting Materials ◽  
Thermoelastic Model ◽  
Mode Method ◽  
Heat Transport Equation ◽  
Effects Of Rotation ◽  
Improved Model

This paper focuses on studying thermal, elastic and coupled plasma waves, in the sense of a photo-thermal process transport within an infinite semiconductor medium. In order to study photo-thermal interactions in two-dimensional semiconducting materials, a new mathematical model based on the Moore–Gibson–Thompson equation (MGTE) is implemented. The MGTE model involving the Green–Naghdi model of type III as well as the heat transport equation proposed by Lord and Shulman. We consider the semi-conductor half-space is rotated at a uniform angular speed and magnetized. The analysis of the distribution of thermophysical fields has been extracted by a normal mode method, represented graphically and discussed. The results predicted by the new and improved model have been compared with the generalized and classic ones. In addition, all field quantities have been examined for effects of rotation, a lifetime of the photo-generated, and the applied magnetic field.

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