ISO 17540:2016

INTERNATIONAL ISO
STANDARD 17540
First edition
2016-12-15
Space systems — Liquid rocket
engines and test stands — Terms and
definitions
Systèmes spatiaux — Moteurs de fusée liquides et stands d’essai —
Termes et définitions
Reference number
©
ISO 2016
© ISO 2016, Published in Switzerland
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ii © ISO 2016 – All rights reserved

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Terms and definitions . 1
2.1 General . 1
2.2 Engine units . 1
2.3 Engine types by way of work process . 2
2.4 Engine types by multiplicity of use and integration . 2
2.5 Engine types by purpose . 2
2.6 Low-thrust engine types by way of work process . 3
2.7 General parameters and performance of engine . 3
2.8 Engine time characteristics, types of operating and resources . 6
2.9 Low-thrust engine performance . 7
2.10 Engine operation modes . 9
2.11 Low-thrust engine operation modes .10
2.12 Chamber (gas generator) components .10
2.13 Gas generator types .12
2.14 Operating process in chamber (gas generator) .12
2.15 Nozzle types .14
2.16 Nozzle items .15
2.17 Nozzle characteristics .16
2.18 Nozzle operation modes .16
2.19 Flow in nozzle .16
2.20 Turbine pump components . .17
2.21 Pump characteristics .18
2.22 Turbine pump general characteristics .18
2.23 Automation units .19
2.24 Devices and methods of control efforts creation in engines .19
2.25 Engine cooling .19
2.26 Engine thermal protection .20
2.27 Engine tests: General .20
2.28 Types of engine tests: Thermal loads .21
2.29 Types of engine tests: Associate with rocket .21
2.30 Types of engine tests: Test site .21
2.31 Types of engine tests: Organizational factor and test site .21
2.32 Types of engine tests: Test conditions .21
2.33 Types of engine tests: Accelerated data accessing .22
2.34 Types of engine tests: Test purposes .22
2.35 Types of tests specific for low-thrust engines .23
2.36 Test technology .23
2.37 Test conditions .23
2.38 Test results.24
2.39 Engine reliability .24
2.40 Engine defects .25
2.41 Engine failure modes .25
2.42 Engine operation .25
2.43 Analysis of engine technical status .26
2.44 Engine reliability index .26
2.45 Engine quality control .26
2.46 Structural and functional analysis of reliability .27
2.47 Test stands: General .27
2.48 Stand types .28
2.49 Stand systems .28
2.50 Post-test processing.29
2.51 Stand system elements.30
2.52 Stand compartments .31
iv © ISO 2016 – All rights reserved

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
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Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.
The committee responsible for this document is ISO/TC 20, Aircraft and space vehicles, Subcommittee
SC 14, Space systems and operations.
Introduction
This International Standard is intended to be applied for all types of rocket engines which use a liquid
propellant.
The terms in this International Standard are specified in scope of design, testing, reliability analysis
and quality control of liquid rocket engines.
The terms are intended to be required for use in all types of documentation and literature including in
scope of standardization or using results of this activity.
vi © ISO 2016 – All rights reserved

INTERNATIONAL STANDARD ISO 17540:2016(E)
Space systems — Liquid rocket engines and test stands —
Terms and definitions
1 Scope
The International Standard provides terms and definitions in scope of design, testing, reliability
analysis and quality control of liquid rocket engines. The terms are required for use in all types of
documentation and literature including in the scope of standardization or using the results of this
activity.
2 Terms and definitions
2.1 General
2.1.1
rocket en
...