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Inspection specification for automobile climatic wind tunnel
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GB/T 45627-2025
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Basic data | Standard ID | GB/T 45627-2025 (GB/T45627-2025) | | Description (Translated English) | Inspection specification for automobile climatic wind tunnel | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | T36 | | Classification of International Standard | 19.040 | | Word Count Estimation | 34,345 | | Date of Issue | 2025-04-25 | | Date of Implementation | 2025-11-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 45627-2025: Inspection specification for automobile climatic wind tunnel---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 19.040
CCST36
National Standard of the People's Republic of China
Technical Specifications for Automobile Environmental Wind Tunnel Test Laboratory
Released on 2025-04-25
2025-11-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of contents
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms, definitions and symbols 1
3.1 Process Control 1
3.2 Location Definition 2
3.3 Environmental simulation parameters 3
3.4 Aerodynamic parameters 5
3.5 Symbols 5
4 Composition of the Automobile Environmental Wind Tunnel Test Room 6
4.1 Overview 6
4.2 Temperature, humidity, wind speed and boundary layer simulation system 6
4.3 Vehicle driving load simulation system 6
4.4 Sunlight Simulation System 6
4.5 Rain and snow simulation system 6
4.6 Thermal Ground Simulation System 6
5 Inspection regulations 6
5.1 Test conditions 6
5.2 Inspection Items 7
5.3 General technical requirements 8
6 Inspection methods 10
6.1 Temperature, humidity and wind speed simulation system 10
6.2 Vehicle driving load simulation system 15
6.3 Sunlight Simulation System 15
6.4 Rain and snow simulation system 17
6.5 Aerodynamic parameter verification 20
6.6 Thermal Ground Simulation System 23
7 Inspection cycle 23
Appendix A (Informative) Symbols and meanings 24
Reference 27
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
Please note that some contents of this standard may involve patents. The issuing organization of this standard does not bear the responsibility for identifying patents.
This document was proposed by the China Machinery Industry Federation.
This document is under the jurisdiction of the National Industrial Process Measurement, Control and Automation Standardization Technical Committee (SAC/TC124).
This document was drafted by. Shanghai Satake Cooling and Heating Control Technology Co., Ltd., China Automotive Engineering Research Institute Co., Ltd., Xiangyang Daan
Automobile Testing Center Co., Ltd., Dongfeng Motor Group Co., Ltd., Shanghai Institute of Metrology and Testing Technology, Shanghai Motor Vehicle Testing Center,
China Automotive Technology and Research Center Co., Ltd., Chongqing Changan Automobile Co., Ltd., China First Automobile Co., Ltd., China Metrology
Scientific Research Institute, Changchun Automobile Testing Center, Shanghai Jiaotong University, Chongqing University, Jilin University, Shanghai Automotive Group Co., Ltd. Technology
Center, Geely Automobile Research Institute (Ningbo) Co., Ltd., Pan Asia Technical Automotive Center Co., Ltd., and Suzhou Satake Heating and Cooling Control Technology Co., Ltd.
The main drafters of this document are. Du Jun, Xu Lei, Zha Jiayun, Wang Xicheng, Sun Jian, Huang Li, Zhu Xiaoming, Mou Liansong, Feng Gang, Li Baoquan, Mao Xiaochen,
Yu Guorui, Xu Dinghua, Zhang Hui, Chen Jiangping, Wang Yong, Hu Xingjun, Zhou Jian, Xie Gang, Qian Rui, Zhang Peng, Ding Ding.
Introduction
The automotive environmental wind tunnel test room integrates a variety of environmental simulation subsystems. It serves as a major test center for the development and performance testing of complete vehicles and parts.
In recent years, the wind tunnel test equipment has been built and applied on a large scale in my country's automobile and auto parts industries.
The laboratory has many measuring instruments and systems for each subsystem, and the inspection of the automotive environmental wind tunnel laboratory is in its infancy in China, so it is necessary to establish and unify
In order to standardize and unify the test methods of various parameters in the automobile environmental wind tunnel test room, it is necessary to standardize the test methods of various parameters in the automobile environmental wind tunnel test room.
The test methods of parameters are standardized.
This document provides information on the temperature, humidity, wind speed, road load, solar radiation, rain and snow involved in the automotive environmental wind tunnel test process.
The static and dynamic indicators of the environment simulation system, such as uniformity, stability, stabilization time, conversion rate and other parameters, are specified.
The test methods of the aerodynamic parameters of the simulation system, such as wind tunnel airflow deflection angle, boundary layer thickness, and static pressure gradient, were explained to provide a reference for the standardization.
Provide reference and guidance for testing the performance indicators of automotive environmental wind tunnel laboratories.
Technical Specifications for Automobile Environmental Wind Tunnel Test Laboratory
1 Scope
This document specifies the inspection regulations and inspection cycles for automotive environmental wind tunnel testing laboratories and describes the corresponding inspection methods.
This document is applicable to the inspection of automotive environmental wind tunnel test chambers, and is also applicable to the inspection of other similar test equipment.
The specified test method is used for various environmental simulation systems. the indication of parameters such as temperature, humidity, wind speed, solar radiation, rain and snow, and their uniformity and stability.
The test includes the test of wind tunnel airflow angle, boundary layer thickness and axial static pressure gradient.
2 Normative references
The contents of the following documents constitute essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
JJG518-2023 Pitot tube calibration procedures
JJF1033-2023 Measurement Standard Assessment Specification
3 Terms, definitions and symbols
The following terms, definitions and symbols apply to this document.
3.1 Process Control
3.1.1
Steady state
The system's characteristic parameters remain constant in the system state.
[GB/T 17212-1998, P1.2.0.05]
3.1.2
Steady time steadytime
When a parameter changes from a certain initial state to a new steady state, the time required from the first reaching of the set value to reaching the new steady state.
3.1.3
Setting time setting time
From the step change of the input signal, until the output variable remains at the input value multiplied by the static gain minus the first-order steady-state deviation of the output variable
The time interval required to remain within the specified tolerance band of the value.
[Source. GB/T 17212-1998, P1.2.1.03, P1.2.1.04, modified]
3.1.4
Conversion rate ramprate
The ratio of the conversion amount to the conversion time when a parameter changes from one steady state to another.
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GB/T 45627-2025: Inspection specification for automobile climatic wind tunnel
Status: Valid
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