MH/T 6129-2024 in English

VALID

Aircraft engine emissions measurement and evaluation

Issued on:2024-03-12
Implemented on:2024-03-12
File Format:PDF
Delivery:Via email within 5 business days

Price(USD)： $1,180.00
$1,145.00

Standard No:	MH/T 6129-2024
Document status:	VALID
Title in English:	Aircraft engine emissions measurement and evaluation
Title in Chinese:	航空发动机排放测量和评估
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 5 business days
Issued on:	2024-03-12
Implemented on:	2024-03-12
ICS Classification:	49.020-Aircraft and space vehicles in general
Chinese Classification:	V35-Aircraft and its accessories in general
Professional Classification:	MH-Civil Aviation
Related Keywords:	aircraft engine emissions measurement aviation engine emissions measurement method full-factor measurement system classification measurement
Related Topics:	trace emissions mh/t mh and t Aircraft engine air conditioning emissions Air Conditioning Emissions machine row air quality engine Measurement Evaluation Box Risk Assessment Emissions Assessment aircraft evaluation Aviation engine industry

本文件规定了航空发动机排放需满足的烟雾、气态排放物、非挥发性微粒物质的测试和评估要求。
本文件适用于航空发动机排放合格审定测试与评估。

Introduction

Analysis of the core content of the standard

MH/T 6129-2024 is the industry standard for aviation engine emissions measurement issued by the Civil Aviation Administration of China. It systematically regulates the full-factor measurement system including smoke, gaseous emissions (CO/HC/NOx) and non-volatile particulate matter (nvPM) for the first time.

Comparison of key technical indicators

Measurement items	Instrument requirements	Accuracy standards	Typical equipment
Smoke (SN)	Reflectometer (ISO 5-4)	±2% reflectivity	Whatman No. 4 filter element
Gaseous emissions	FID/NDIR/Chemiluminescence	±1%FSD	HEPA filter
nvPM	CPC/VPR system	±5% particle size distribution	Catalytic stripper

Innovation in measurement method

1. Non-volatile particulate measurement

The standard clearly adopts the volatile particulate remover (VPR) system for the first time, requiring the electromigration diameter (D_m) classification measurement of particles that are not volatilized when heated at 350℃, and the geometric standard deviation σg must be controlled within 1.8.

2. Special treatment for afterburner

For engines with afterburner, it is stipulated that the sampling plane should be 18-25 times the diameter of the nozzle, and the 13-point grid method should be used to obtain representative samples to avoid interference from chemical reactions.

Implementation Recommendations

Laboratory Accreditation: Must be accredited by ISO/IEC 17025, with calibration traceable to the International System of Units
Fuel Control: The test fuel must meet the requirement of aromatic content ≤25% in Appendix A
Data Correction: Correction factor for altitude and humidity effects K= (PB_ref/PB)^a×exp(TB_ref-TB/c)