ASTM E 2459 Standard Guide for Measurement of In-Duct Sound Pressure Levels from Large Industrial Gas Turbines and Fans
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ASTM E 2459 Document Information:
Title
Standard Guide for Measurement of In-Duct Sound Pressure Levels from Large Industrial Gas Turbines and Fans
ASTM International
Publication Date:
Oct 15, 2005
Scope:
This guide is intended to provide a simple and consistent procedure
for the in-situ field
measurement of in-duct sound pressure levels in large low pressure
industrial air ducts, such as
for gas turbines or fans, where considerations such as flow velocity,
turbulence or temperature
prevent the insertion of sound pressure sensors directly into the
flow. This standard guide is
intended for both ambient temperature intake air and hot exhaust gas
flow in ducts having cross
sections of four (4) square meters, or more.
The described procedure is intended to provide a repeatable and
reproducible measure of the in-duct
dynamic pressure level at the inlet or exhaust of the gas turbine, or
fan. The guide is not
intended to quantify the "true" sound pressure level or sound power
level. Silencers, as well as
Waste Heat Boilers, must be designed using the in-duct sound power
level as the basis. Developing
the true sound power level based on in-duct measurements of true sound
pressure within a complete
operating system is complex and procedures are developmental and often
proprietary.
This standard does not purport to address all of the safety concerns,
if any, associated with its
use. It is the responsibility of the user of this standard to
establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use. Extreme
caution is mandatory when working near hot exhaust gas systems and
appropriate safety precautions
such as the installation of quick acting isolation valves are
recommended.
Keywords:
- field sound pressure level
- gas turbine exhaust noise
- gas turbine inlet noise
- gas turbine noise
- high temperature flow noise
- in-duct sound
- industrial noise
- machinery noise
- noise in turbulent flow
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