THERMAL SCIENCE

International Scientific Journal

Jinsheng Cui

,

Xuyan Hou

,

Zongquan Deng

,

Wanjing Pan

,

Qiquan Quan

PREDICTION OF THE TEMPERATURE OF A DRILL IN DRILLING LUNAR ROCK SIMULANT IN A VACUUM

ABSTRACT
In this article, the temperature of a sampling drill in drilling lunar rock simulant in a high-vacuum environment was studied. The thermal problem was viewed as a 1-D transient heat transfer problem in a semi-infinite object. The simplified drill was modeled using heat conduction differential equation and a fast numerical calculation method is proposed on this basis, with time and the drill discretized. The model was modified to consider the effects of radiation, drill bit configuration, and non-constant heat source. A thermal analysis was conducted using ANSYS Workbench to determine the value of the equivalent correction coefficient proposed in this paper. Using fiber Bragg grating temperature measurement method, drilling experiments were conducted in a vacuum, and the results were compared to the model. The agreement between model and experiment was very good.
KEYWORDS
drill temperature, vacuum, radiation, fast numerical calculation
PAPER SUBMITTED: 2014-10-23
PAPER REVISED: 2015-04-15
PAPER ACCEPTED: 2015-04-15
PUBLISHED ONLINE: 2015-05-03
DOI REFERENCE: https://doi.org/10.2298/TSCI141023051C
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2017, VOLUME 21, ISSUE Issue 2, PAGES [989 - 1002]
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Prediction of the temperature of a drill in drilling lunar rock simulant in a vacuum

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence