Radiative Heat Transfer Analysis of Railroad Bearings Using a Single Bearing Test Rig for Wayside Thermal Detector Optimization

Crown, Stephen; Tarawneh, Constantine

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Radiative Heat Transfer Analysis of Railroad Bearings Using a Single Bearing Test Rig for Wayside Thermal Detector Optimization

2018-12-01
By Crown, Stephen ; Tarawneh, Constantine

File Language:

English

Details

Creators:

Crown, Stephen ; Tarawneh, Constantine
Corporate Creators:

University of Texas Rio Grande Valley. Department of Mechanical Engineering
Corporate Contributors:

Texas Transportation Institute. University Transportation Center for Railway Safety ; United States. Department of Transportation. University Transportation Centers (UTC) Program
Subject/TRT Terms:
Publication/ Report Number:

DTRT13-G-UTC59
Resource Type:

Tech Report
Geographical Coverage:

United States
Edition:

January 2015 – December 2018
Corporate Publisher:

Texas Transportation Institute. University Transportation Center for Railway Safety
Abstract:

Wayside hot-box detectors (HBDs) are devices that are currently used to evaluate the health of railcar components including bearings, axles, and brakes by monitoring their temperatures. While HBDs have been instrumental in reducing some train derailments in the past few decades, the number of non-verified bearing removals has increased significantly. In general, HBDs tend to underestimate bearing temperatures in both field service and in laboratory testing, which is not surprising considering the simple calibration method that is used to calibrate these devices. Because of this, different calibrations were compared and analyzed including two-point, three-point, and multi-point calibrations. Analysis of the results also suggests that the scanning location significantly affects the temperature measurement. The work summarized here describes how an optimized calibration technique along with proper infrared (IR) sensor alignment can markedly improve the accuracy and precision of wayside HBD temperature measurements in field service.
Format:

PDF
Download URL:

https://rosap.ntl.bts.gov/view/dot/66841/dot_66841_DS1.pdf
File Type:

[PDF - 682.92 KB]
Collection(s):

University Transportation Centers
Main Document Checksum:

urn:sha256:6a5c5c79dd57e9af0a8658ce0c5962558fcfc2bb0ca5747dec0499dee2184ca7

File Language:

English

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