Determination of in-duct sound pressure levels for industrial fans and large gas turbines testing

The material testing procedure Determination of in-duct sound pressure levels for industrial fan systems and large gas –turbines provides useful information to determine priority noise control measures and efficient manufacturing – product improvement– product enhancement.

Overview of the test procedure Determination of in-duct sound pressure levels for industrial fan systems and large gas turbines

Test name: Determination of in-duct sound pressure levels for industrial fan systems and large gas turbines.

Test method: ASTM E2459 – 05: 2016: Standard Guide for Measurement of In-Duct Sound Pressure Levels from Large Industrial Gas Turbines and Fans [1].

Performed at: Field area where the industrial fan system and large gas turbines are located.

1. Objectives and test objects

– Test objectives

• Determine in-duct sound pressure levels of fans and large gas turbines
• When airflow rate, turbulence level, or temperature prevents the direct insertion of acoustic pressure sensors into the flow
• Ducts with a cross-section of 4m² (equivalent to a diameter of 2.2m) or greater.

– Test objects

Large industrial fans/gas turbines.

2. Experimental procedure

Steps to perform:

• Equip fully with necessary equipment, microphones, and test samples.
• Perform sample measurement.
• Process and report results.

3. Notes

• The tap/opening location (blue rectangle) on the test duct has a diameter of approximately 25.4mm/1 inch or less. The stem tube should reach just to the point of touching the inner wall of the test duct (red circle).
• The opening location must ensure maximum smoothness to avoid flow turbulence at the inner wall surface of the duct. Mesh screens may be used at the inner wall location, but must not affect measurement results by quantifying the difference with and without its use.
• The absorption duct section must be a continuous single-diameter pipe (without joints) and thoroughly checked to ensure no internal obstacles could cause impact reflection of sound. Avoid letting the pipe touch locations or air streams.
• The other end of the absorption duct must be sealed with sound absorption material (mineral wool), except when airflow is required for cooling.

Role – importance of the test procedure Determination of in-duct sound pressure levels for industrial fan systems and large gas turbines

The test procedure Determination of in-duct sound pressure levels for industrial fan systems and large gas –turbines conducted by DASM Institute helps provide useful information, meeting practical needs of customers and enterprises wishing to:

• Control noise, isolate noise sources, prevent noise, implement mitigation measures to avoid health and safety risks and avoid negative impacts on the surroundings.
• Measure the working environment and assign appropriate job tasks. Train workers exposed to noisy environments to understand the hazards of noise and safe working measures.
• Material manufacturers, consulting – design units… of industrial fan systems and large gas turbines wanting to achieve noise reduction, sound absorption, sound insulation… goals; wanting to evaluate the effectiveness of noise reduction measures.
• Help control quality during production, optimize research and development of products and materials helping to reduce sound, anti-noise, sound absorption, sound insulation… related to noise emitted by industrial fan systems and large gas turbines.
• Control equipment status, early detect signs and causes of damage… to proactively maintain machinery.
• Commercial/consulting businesses have a verified basis to propose and implement solutions prioritizing machinery, equipment, and appropriate technical-technological initiatives capable of minimizing noise impact.
• Support legal dispute issues, lawsuits, forensic appraisal requests, measurement and environmental sample analysis in cases of noise violations exceeding environmental technical regulations.

At the same time, DASM will conduct consulting and design work to create shape/structure/material solutions to efficiently and economically adjust customer test samples (in case standards are not met).

If previously you had concerns and worries and had to spend many fees for similar activities abroad, now you just need to contact DASM. The remaining entire process will be proactively implemented by us as a package within the fastest time to complete customer experience about us: DASM provides acoustic consulting services with truly superior quality, most competitive prices in the industry along with thoughtful, dedicated customer care policies.

Significance of acoustic testing services at DASM

Today's globalized commercial life opens up countless new markets and supply sources across five continents. Accompanied by it are international regulations and standards helping customers easily evaluate quality – trace product origin, select suitable/superior items. Especially, they support manufacturers to continuously improve and perfect technology, techniques, raw materials, production methods, sales… etc…

DASM Institute is a pioneering, comprehensive, professional, top reputable brand in Vietnam in the field of acoustics. On January 12, 2023, DASM was granted certificate No. 114/TĐC – HCHQ by the Directorate for Standards, Metrology and Quality (Ministry of Science and Technology), certifying registered multi-sector testing operations in the Mechanical-Physical field (registration number: 707/TN – TĐC).

Our acoustic material testing services provide clients with practical professional results to meet sustainability, standard performance, and optimal design solutions - consulting - calibration for products and services. From there, you will update, meet, and adapt to constantly changing international standards to achieve breakthroughs in revenue and profit and elevate your brand.

If you have a need to perform Pmaterial testing Determining duct sound pressure level of system fan industrial and large-scale gas tur–bine please contact via Hotline for detailed consultation!