| |
|
S19 Usinagem dos Materiais |
| |
|
Title:
|
CONVECTIVE HEAT TRANSFER COEFFICIENTS IN TURNING
|
| |
|
Summary :
|
|
ABSTRACT. METHODOLOGY FOR DETERMINATION OF CONVECTIVE HEAT TRANSFER COEFFICIENTS FOR SPECIFIC CONDITIONS EXISTING IN TURNING WAS DEVELOPED. EXPERIMENTS ON WORKPIECE COOLING CONDUCTED ON A LATHE PROVIDED REFERENCE TEMPERATURE DATA FOR A MODEL OF A CYLINDRICAL WORKPIECE, WHICH WAS SOLVED FOR TEMPERATURE USING A CONTROL-VOLUME FINITE DIFFERENCE CODE. AN ITERATIVE OPTIMIZATION PROCEDURE MINIMIZED THE DIFFERENCE BETWEEN COMPUTER PREDICTION AND TEMPERATURE MEASUREMENTS. HEAT TRANSFER COEFFICIENTS WERE OBTAINED FOR VARIOUS CONVECTIVE BOUNDARY CONDITIONS EXISTING ON A WORKPIECE WHEN COOLING IN AIR AND IN COOLANT. COOLING CHARACTERISTICS CALCULATED USING THESE HEAT TRANSFER COEFFICIENTS SHOWED GOOD AGREEMENT WITH THE EXPERIMENT. PRESENTED APPROACH CAN BE USED TO OBTAIN THE CONVECTIVE HEAT TRANSFER COEFFICIENTS FOR STUDIES ON MODELLING THERMAL BEHAVIOUR OF A WORKPIECE IN OTHER CONDITIONS.
|
| |
|
Author :
|
Arenson, M. 0
Kops, L. 0
|
| |
|
Paper View :
|
|
COBEM99
| Organizing Committee | Keynotes
| Technical
Sessions | Author
| Symposia and special sessions
| Referees |
Work
Titles | Venue
|
