Numerical Study of the Thermal Model on High Uniformity Temperature Test Platform

Zijuan Wang,Han Xiao,Ying Zhou,Shao Jingyi,P Tandon,R Furutani,W Wisnoe

doi:10.1051/matecconf/201925603003

Abstract

The surface temperature uniformity of a test platform with an effective test area of 600 mm × 600 mm was numerically studied. The conductive heat transfer model for the test platform and the device under test (DUT) installed on the surface was established in the present work, as well as the radiation heat transfer model from the platform surface to the background temperature. The platform surface was divided into 5 or 9 regions where heated independently to make the surface temperature consistent. The temperature uniformity of these two partition designs was compared. The result shows that the 9 regions design has higher temperature uniformity at both target temperatures of -10°C and +45°C.

Highlights

The spacecraft payload in orbit provides certain requirements for the thermal control system
By exploring the space interference measurement task of the generation space telescope (NGST), the requirements of optical system were proposed by NASA as follows: 1. The stability of the optical element position should be maintained at the nanoscale
The surface temperature uniformity of a test platform with an effective test area of 600 mm × 600mm was numerically studied in this paper

Summary

Introduction

The spacecraft payload in orbit provides certain requirements for the thermal control system. These requirements of spacecraft mainly include operating temperature range, temperature uniformity, temperature stability, etc. The temperature uniformity requirement is generally put forward in the form of temperature difference or temperature gradient, which is determined by the thermal deformation of materials. For the main mirror of a 1m diameter solar telescope, the deviation of the mirror parabola is required to be less than λ/40 (λ=663nm), the focal distance difference is less than 0.15mm, and the displacement along the axis is less than 0.05mm. The 3mdiameter main mirror of the Hubble telescope should be kept at a constant temperature of 21.1 °C and its temperature uniformity should be less than 0.1°C [1, 2]. By exploring the space interference measurement task of the generation space telescope (NGST), the requirements of optical system were proposed by NASA as follows: 1. The stability of the optical element position should be maintained at the nanoscale

Methods

Discussion

Conclusion