GB/T 42680-2023 in English

VALID

Test method for liquid fuel atomization characteristics using phase Doppler technique

Issued on:2023-05-23
Implemented on:2023-12-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $240.00
$233.00

Standard No:	GB/T 42680-2023
Document status:	VALID
Title in English:	Test method for liquid fuel atomization characteristics using phase Doppler technique
Title in Chinese:	基于相位多普勒技术的液体燃料雾化特性测试方法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2023-05-23
Implemented on:	2023-12-01
ICS Classification:	27.060-Burners. Boilers
Chinese Classification:	F04-Basic standards and general method
Professional Classification:	GB-National Standard
Related Keywords:	test conditions test environment open environment requirements test method test environment test requirements liquid fuel atomization characteristics
Related Topics:	liquid fuel Doppler liquid phase technology Although the liquid phase Doppler technique Doppler technique liquid chemistry method liquid phase linear method liquid atomizer How much is the liquid phase linear Multimedia technical features Liquid basic performance testing methods liquid phase chemistry methods Phase Doppler Phase Doppler Particle Analyzer

《GB/T 42680-2023基于相位多普勒技术的液体燃料雾化特性测试方法》由TC441（全国燃烧节能净化标准化技术委员会）归口，主管部门为国家标准委。

Introduction

1. Standard Overview

GB/T 42680—2023 specifies the test method for liquid fuel atomization characteristics based on phase Doppler technology, including test principles, equipment requirements, test conditions, test steps and data processing. This standard is applicable to the evaluation of atomization characteristics of liquid fuel injection systems.

2. Test Principle

The test system based on phase Doppler analyzer (PDA) uses the Doppler effect to measure the velocity and diameter of droplets through changes in laser interference and droplet scattered light signals. Two laser beams of different frequencies intersect at the measuring body to form interference fringes. When droplets pass through, Doppler pulse signals are generated, and their frequency and phase correspond to the droplet velocity and diameter, respectively.

3. Test Equipment

The test system consists of a liquid fuel injection system, a PDA, a synchronous control system and a computer. Key equipment includes:

Laser transmitting probe
Signal receiving probe
Photoelectric detector
Data analysis system

4. Test conditions

Test environment	Open environment requirements	Restricted environment requirements
Pressure control	-	The internal pressure of the container is adjustable and does not exceed the maximum allowable working pressure
Temperature range	-	The ambient temperature is adjustable and the specific value is recorded
Gas Conditions	Normal atmospheric pressure	Adjust according to test requirements

5. Test Steps

Step 1: Equipment Installation and Marking

Arrange the liquid fuel injection system and PDA in the test environment, mark the nozzle circumferential position and record the coordinates.

Step 2: PDA Debugging

Enter the parameters of the laser transmitting probe and the signal receiving probe, and optimize the laser power to ensure the droplet group penetration effect.

Step 3: Synchronous Control

Adjust the synchronous control system of the injector and PDA to ensure the coordinated work of the test equipment.

6. Data Processing and Analysis

Calculate the droplet velocity, diameter and its statistical parameters (such as average velocity, root mean square velocity, velocity turbulence, etc.) based on the test data, and generate distribution maps and spatial maps.

7. Implementation Recommendations

Data Collection Optimization

To ensure the statistical significance of the test data, it is recommended to collect at least 100 injection cycles and record the data of each cycle.

Equipment Maintenance

Regularly calibrate the laser and photodetector to ensure measurement accuracy. At the same time, check the working status of the synchronization control system to avoid time deviation affecting the test results.

Environmental Control

When testing in a restricted environment, strictly control the pressure and temperature parameters of the container and record all adjustment details.

More samples: NB/T 47013.2-2015 JJG 21-2008 GB 50021-2001(2009)

Sample only — not a preview of GB/T 42680-2023