Internal Temperature Distribution in a Rolling Tire

Abstract

A computer program is developed to calculate the internal temperature distribution in a rolling tire. The geometry of the tire cross section is transformed to simple computational domains by using a boundary-fitted coordinate transformation method. A heat transfer equation in the tire is also transformed to be calculated in the computational domain. Heat generation rates are estimated from load, speed, contained air pressure, and a static stress and strain analysis. An unsteady two-dimensional heat conduction equation is solved with heat convection and radiation boundary conditions. External surface temperature distributions are measured by an infrared camera system and the temperature of the contained air is measured by a thermocouple. The conductivities of various materials in the tire and various heat transfer coefficients along the tire boundary are given in an input file. Some internal temperatures measured by buried thermocouples in the actual tire are compared with the calculated temperatures.

A Review of Patents in Tyre Cooling

“…The fundamental phenomenon behind the heat generation in tyres is the friction between molecules when the rubber in the structure of the tyre is under a kinematic deformation by a continuous compression-tension or torsion [2]. This kinematic deformation is known as the hysteresis effect.…”

The Interior Temperature Distribution Measurement in a Rolling Tire

“…The heat sources which are mainly produced by the tire hysteresis losses contribute to the tire temperature rise. Several papers [1][2][3][4][5] have been presented on tire temperature prediction based on Finite Element Method. However, there are not enough measured temperatures to verify the predicted results, especially for the interior tire temperature.…”

“…In the case of data transmission, when sensors are installed inside the tire, wireless data transmission is indispensable [6]. Although a slip ring can also be used in measurements for rotating tires [3][4][5][7][8], abrasion of the brush and rings may occur and the slip ring does not have a long operational life.…”

“…In terms of the temperature sensors, thermocouples and thermistors are widely used. Various authors [3][4][5][7][8] have only measured the steady state temperatures at certain points in the tire body with buried thermocouples. However, more interior temperature information are needed, especially the tire cavity temperature distribution.…”

Modelo para gestão do desenvolvimento e produção de pneus fornecidos para industria automobilística.

“…O regime térmico exerce forte influência sobre a distribuição de probabilidade de ocorrência de falhas. Esse tema é estudado por Park et al [238] e Oh et al [239] . Nakatsuji et al [240] propôs um modelo para calcular o coeficiente de atrito para evitar acidentes em estradas cobertas por neve ou gelo.…”