EVALUATION OF SPACECRAFT THERMAL MODEL WITH THERMAL BALANCE TEST AND FLIGHT DATA

2018 ◽  
Author(s):  
S. Rajesha Kumar ◽  
Nalini K
Keyword(s):  
Thermal Model ◽  
Thermal Balance ◽  
Balance Test ◽  
Flight Data

Geosyncronous imager thermal balance test and thermal model modification

2014 ◽  
Author(s):  
Bingting Hu ◽  
Yaohai Dong ◽  
Ganquan Wang ◽  
Shichen Jiang
Keyword(s):  
Thermal Model ◽  
Thermal Balance ◽  
Balance Test ◽  
Model Modification

Study on Mechanism of Molybdenum Concentrate Carbon-Free Roasting

2012 ◽  
Vol 588-589 ◽  
pp. 1685-1688 ◽  
Author(s):  
Lian Yong Wang ◽  
Jing Fan Zhang ◽  
Lei Dai ◽  
Jiu Ju Cai
Keyword(s):  
Technical Analysis ◽  
Economic Benefits ◽  
Thermal Balance ◽  
Environmental Benefits ◽  
Heat Of Reaction ◽  
Balance Test ◽  
Operating Process ◽  
Output Quality ◽  
Molybdenum Concentrate

Technical analysis was used to analyze the roasting of molybdenum concentrate on the basis of thermal balance test of rotary furnaces used for Roasting, and the results indicate that, on the condition of commercial production, the Roasting of MoS2 can occur spontaneously because the heat of reaction is so much that proper cooling measures should be adopted in case overheating happens. According to above analysis, carbon-free roasting technology of molybdenum concentrate was proposed in this paper. The results, which come from thermal balance test and technical analysis of rotary furnaces used for carbon-free roasting of molybdenum concentrate, indicate that outer heat source used in traditional Roasting technology is not needed in carbon-free roasting technology, because enough heat is generated during Roasting to ensure spontaneous reaction. In fact, heating is not needed in operating process except at the beginning, to make molybdenum concentrate catching fire, and when reaction completing, to remove residual sulphur. The technology in this paper is obviously advantageous in aspects of energy saving, output, quality of production, heat loss, the concentration of SO2 in flue gas, etc. and will have remarkable environmental benefits, economic benefits and social benefits.

Methodology of Thermal Balance Test for Diesel engines

2008 ◽  
Author(s):  
Luciano Tadeu Baffi Penhalbel ◽  
Edson Dias Ferreira ◽  
Jorge Paulo Dantas de Araújo ◽  
Mauro Roberto Souza Sobral ◽  
Flávio Benjamin Borges Moreira
Keyword(s):  
Diesel Engines ◽  
Thermal Balance ◽  
Balance Test

scholarly journals Data Raduction of Thermal Balance Test of Spacecraft

1970 ◽  
Vol 18 (199) ◽  
pp. 316-321
Author(s):  
Harumi TAKAHASHI ◽  
Koich OSHIMA
Keyword(s):  
Thermal Balance ◽  
Balance Test

Design and development of thermal test model of a micro‐satellite for thermal balance test

2008 ◽  
Vol 80 (1) ◽  
pp. 51-58 ◽  
Author(s):  
Gilbert Justin Jose Nesamani ◽  
Sunil Chandrakant Joshi ◽  
Zhanli Jin ◽  
Poh Keong Chan ◽  
Soon Cheng Lee
Keyword(s):  
Thermal Balance ◽  
Test Model ◽  
Design And Development ◽  
Balance Test ◽  
Thermal Test

A Simplified Thermal Model and Comparison Analysis for a Stratospheric Lighter-Than-Air Vehicle

2017 ◽  
Vol 140 (2) ◽  
Author(s):  
Wei Zheng ◽  
Xiangyi Zhang ◽  
Rong Ma ◽  
Yong Li
Keyword(s):  
Thermal Model ◽  
Radiation Heat Transfer ◽  
Simplified Model ◽  
Full Model ◽  
Gas Temperature ◽  
Radiation Heat ◽  
Flight Data ◽  
Comparison Results ◽  
Inner Surface ◽  
Transient Thermal

Transient thermal behavior modeling and simulation is a key issue in predicting flight performance of stratospheric lighter-than-air (LTA) vehicles, such as airships or balloons. To reduce computational load of the transient thermal model without significant loss of accuracy, first this paper adopted an analytical model of view factor from the element surfaces to the Earth and constructed a full distributed parameter transient thermal model. Then, the full model was validated by comparing the predictions obtained from the full model with the flight experimental data. The comparison results show that the divergence of the predicted average internal gas temperatures from the flight data is about 0.4%, and the divergence of the predicted envelop temperatures from the flight data is less than 2.4%. Furthermore, considering that the effect of the net radiation heat transfer among the inner surface enclosure on average internal gas temperature is far less than radiation heat transfer of the outer surfaces, the full model was simplified by omitting radiant heat exchange within the inner surface enclosure. The accuracy of the simplified model was investigated by comparing the predictions of average internal gas temperature and skin temperature distribution between the simplified model and full model under various conditions, such as flight time, altitude, and different external skin thermal properties. The comparison results indicate that the simplified model agrees well with the full model. The discrepancies of the predicted average internal gas temperature between the two models are less than 0.3% under most conditions, and the discrepancies of the predicted temperature distribution between the two models are also acceptable when the LTA vehicle, especially with low absorptivity/emissivity ratio coatings, operates at about 20 km altitude.

Integrated Thermal-Structural Analysis of a Reflecting Optical System with All Metal Components

2014 ◽  
Vol 1061-1062 ◽  
pp. 818-821
Author(s):  
Ban Lv ◽  
Guo Li Wang ◽  
Yu Yang
Keyword(s):  
Structural Analysis ◽  
Low Temperature ◽  
Ambient Temperature ◽  
Optical System ◽  
System Performance ◽  
Thermal Deformation ◽  
Thermal Balance ◽  
Optical Analysis ◽  
Balance Test ◽  
Full Analysis

The thermal deformation of reflecting optical system in the ambient temperature affects the system performance greatly. Based on the results of thermal balance test, the paper has made a full analysis to the deformation of reflecting optical system on the high-low temperature using the finite elemernt method,so as to validate whether the optical system meet the requirement of optical image design and temperature. This method can combine the thermal optical analysis and thermal balance test data effectively ,and therefore the most actual thermal optical anslysis model can be obtained to guide the concept and optimization of reflecting optical system.

Qualification of the Setup to Simulate the External Thermal Balance Test of the CBERS-2B Satellite Using a Infrared Lamp Technique

2006 ◽  
Author(s):  
Herbert Paula de Vasconcelos ◽  
Ezio Castejon Garcia ◽  
Eduardo de Oliveira Pontes ◽  
Márcio Bueno dos Santos
Keyword(s):  
Thermal Balance ◽  
Balance Test ◽  
Infrared Lamp
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