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GB/T 44448-2024Test specification for low-speed wind tunnel performance (English PDF)

低速风洞性能测试规范

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

September 29, 2024

Implementation date

September 29, 2024

Scope

GB/T 44448-2024 is the English-translated version of 低速风洞性能测试规范.

GB/T 44448-2024 is the Chinese national standard covering the meteorological low-speed wind tunnel, up to 85 m/s — the flow speed range, the uniformity of speed across the section measured on the point grid fixed in the normative annex, the stability of speed over time, the speed ratio between the secondary sections and the main one, and the temperature rise from continuous running, which drifts the very instrument the tunnel is there to check. First edition, under the China Meteorological Administration. In force from 29 September 2024. Issued on 29 September 2024, it has been in force since 29 September 2024.

Document preview — GB/T 44448-2024

National Standard of the People's Republic of China

ICS: 07.060
Classification: N 95

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

PrefaceIII
1 Scope1
2 Normative references1
3 Terms and Definitions1
4 Test Requirements1
5 Test Method2
6 Test Report5
Appendix A (Informative) Standard flow rate calculation method7
Appendix B (Normative) Arrangement of flow rate uniformity test points8

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 of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document was proposed by the China Meteorological Administration.

This document is under the jurisdiction of the National Technical Committee for Standardization of Meteorological Instruments and Observation Methods (SAC/TC507).

This document was drafted by: China Meteorological Administration Meteorological Observation Center, Chinese People's Liberation Army 61540 Unit, Xinjiang Uygur Autonomous Region Meteorological Technical Equipment Support Center, Zog Microsystems (Hangzhou) Co., Ltd., Zhejiang Atmospheric Sounding Technology Support Center, Aerospace New Meteorological Technology Co., Ltd.

Company, Tibet Autonomous Region Atmospheric Sounding Technology and Equipment Support Center, and 93220 Unit of the People's Liberation Army of China.

The main drafters of this document are: Chen Xi, Li Songkui, Jiang Mingbo, Yin Xingchen, Chong Wei, Qi Tao, Miao Chenbiao, Luo Chang, Sun Lixin, Zhu Jing, Yuan Wei, Chen, Hua, Luo, Zangjia, and Yang, Yuexin.

Low speed wind tunnel performance test specification

1 Scope

This document specifies the test requirements for low-speed wind tunnels (hereinafter referred to as wind tunnels) and provides corresponding test methods, test reports, etc.

This document is applicable to the main performance tests of meteorological low-speed wind tunnels with air velocity not exceeding 85m/s.

2 Normative references

This document has no normative references.

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Test section test section

The area in a wind tunnel used to install the instrument under test or the standard.

Note. When the wind tunnel has two or more test sections, the test section where the standard instrument is installed is called the main test section.

3.2 Uniformity of velocity

The uniformity of air velocity distribution on the same cross section in a wind tunnel test section.

3.3 Stability of velocity

The degree to which the air velocity in a wind tunnel test section pulsates over time.

3.4 velocity ratio

The ratio of the air flow velocity in other test sections to that in the main test section within the wind tunnel flow velocity range.

3.5

The amount of change in the air flow temperature in the test section caused by continuous operation of the wind tunnel.

Note. The unit is Celsius (°C).

4 Test requirements

4.1 Test items

According to the actual application needs, select the test section and test items. Test items generally include flow rate range, flow rate uniformity, flow rate stability The test items shall comply with the requirements of Table 1.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Editions of GB/T 44448

Edition	Title	Revision	Status
GB/T 44448-2024	Test specification for low-speed wind tunnel performance	current edition	Current

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