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BSI PD CEN/TR 17603-31-17:2022

BSI PD CEN/TR 17603-31-17:2022

$198.66

Space engineering. Thermal analysis handbook

Published By Publication Date Number of Pages
BSI 2022 68
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This handbook is dedicated to the subject of thermal analysis for space applications. Thermal analysis is an important method of verification during the development of space systems. The purpose of this handbook is to provide thermal analysts with practical guidelines which support efficient and high quality thermal modelling and analysis. Specifically, the handbook aims to improve: 1.the general comprehension of the context, drivers and constraints for thermal analysis campaigns; 2.the general quality of thermal models through the use of a consistent process for thermal modelling; 3.the credibility of thermal model predictions by rigorous verification of model results and outputs; 4.long term maintainability of thermal models via better model management, administration and documentation; 5.the efficiency of inter-organisation collaboration by setting out best practice for model transfer and conversion. The intended users of the document are people, working in the domain of space systems, who use thermal analysis as part of their work. These users can be in industry, in (inter)national agencies, or in academia. Moreover, the guidelines are designed to be useful to users working on products at every level of a space project – that is to say at system level, sub-system level, unit level etc. In some cases a guideline could not be globally applicable (for example not relevant for very high temperature applications). In these cases the limitations are explicitly given in the text of the handbook.

PDF Catalog

PDF Pages PDF Title
2 undefined
9 1 Scope
1.1 Objectives and intended audience
1.2 Context
11 2 References
13 3 Terms, definitions and abbreviated terms
3.1 Terms from other documents
14 3.2 Terms specific to the present document
15 3.3 Abbreviated terms
18 4 Modelling guidelines
4.1 Model management
19 4.2 Model configuration and version control
4.3 Modelling process
21 4.4 Modularity and decomposition approach
4.5 Discretisation
4.5.1 Overview
22 4.5.2 Spatial discretisation and mesh independence
4.5.3 Observability
23 4.5.4 Time discretisation
24 4.5.5 Input parameters
25 4.6 Transient analysis cases
4.7 Modelling thermal radiation
4.7.1 Introduction to thermal radiation
26 4.7.2 Radiative environment
27 4.7.3 Thermo-optical properties
28 4.7.4 Transparency and optical elements
4.7.5 Spectral dependency
29 4.7.6 Radiative cavities
30 4.7.7 Geometrical modelling
31 4.8 Considerations for non-vacuum environments
4.8.1 General
4.8.2 Specific regimes
4.8.3 Conduction or convection
32 4.8.4 Heat transfer coefficient correlation
4.8.5 Charge/discharge of gas inside pressurised systems
33 5 Model verification
5.1 Introduction to model verification
5.2 Topology checks
34 5.3 Steady state analysis
35 5.4 Finite element models
36 5.5 Verification of radiative computations
37 6 Uncertainty analysis
6.1 Uncertainty philosophy
38 6.2 Sources of uncertainties
6.2.1 General
6.2.2 Environmental parameters
39 6.2.3 Physical parameters
6.2.4 Modelling parameters
6.2.5 Test facility parameters
40 6.3 Classical uncertainty analysis
41 6.4 Stochastic uncertainty analysis
6.5 Typical parameter inaccuracies
43 6.6 Uncertainty analysis for heater controlled items
44 7 Model transfer, conversion and reduction
7.1 Model transfer
7.1.1 Introduction to model transfer
7.1.2 Analysis files and reference results
46 7.1.3 Documentation
7.1.4 Portability of thermal models
47 7.2 Model conversion
7.2.1 Introduction to model conversion
48 7.2.2 Management of thermal model conversions
49 7.2.3 Model conversion workflow
52 7.2.4 Verification of radiative model conversions
54 7.2.5 Verification of thermal model (TMM) conversions
7.3 Model reduction
7.3.1 Introduction to model reduction
55 7.3.2 Management
7.3.3 Model reduction guidelines
56 7.3.4 Model reduction correlation success criteria
57 7.3.5 Model reduction approaches
7.3.5.1 Model reduction methods
58 7.3.5.2 Manual method
7.3.5.3 Mathematical methods

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BSI PD CEN/TR 17603-31-17:2022
$198.66