Single-stage dilution tunnel design

Qiang Wei; David B Kittelson; Winthrop F. Watts

doi:10.4271/2001-01-0207

Single-stage dilution tunnel design

Qiang Wei, David B Kittelson, Winthrop F. Watts

Mechanical Engineering

Research output: Contribution to conference › Paper › peer-review

Abstract

A single-stage dilution system has been designed to simulate the process of engine exhaust dilution in the atmosphere. An exhaust sample stream is introduced into a partial flow tunnel where it is diluted at a controlled rate. Temperature, relative humidity, dilution ratio and rate, and residence time are all adjustable. The system includes a turbulence generator to adjust the intensity of turbulence in the tunnel and a wake disk to control the initial mixing rate. Numerical methods were used to simulate flow fields, velocity fields, and mixing profiles for gases and particles. Mixing profiles for a gaseous tracer and particles of different sizes were also determined experimentally and compared with the model predictions. Critical parameters that influence mixing profiles and dilution rates predicted by modeling were demonstrated experimentally. Predicted and measured normalized mixing profiles were found to be in good agreement.

Original language	English (US)
DOIs	https://doi.org/10.4271/2001-01-0207
State	Published - Dec 1 2001
Event	SAE 2001 World Congress - Detroit, MI, United States Duration: Mar 5 2001 → Mar 8 2001

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Other	SAE 2001 World Congress
Country/Territory	United States
City	Detroit, MI
Period	3/5/01 → 3/8/01

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10.4271/2001-01-0207

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title = "Single-stage dilution tunnel design",

abstract = "A single-stage dilution system has been designed to simulate the process of engine exhaust dilution in the atmosphere. An exhaust sample stream is introduced into a partial flow tunnel where it is diluted at a controlled rate. Temperature, relative humidity, dilution ratio and rate, and residence time are all adjustable. The system includes a turbulence generator to adjust the intensity of turbulence in the tunnel and a wake disk to control the initial mixing rate. Numerical methods were used to simulate flow fields, velocity fields, and mixing profiles for gases and particles. Mixing profiles for a gaseous tracer and particles of different sizes were also determined experimentally and compared with the model predictions. Critical parameters that influence mixing profiles and dilution rates predicted by modeling were demonstrated experimentally. Predicted and measured normalized mixing profiles were found to be in good agreement.",

author = "Qiang Wei and Kittelson, {David B} and Watts, {Winthrop F.}",

year = "2001",

month = dec,

day = "1",

doi = "10.4271/2001-01-0207",

language = "English (US)",

note = "SAE 2001 World Congress ; Conference date: 05-03-2001 Through 08-03-2001",

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T1 - Single-stage dilution tunnel design

AU - Wei, Qiang

AU - Kittelson, David B

AU - Watts, Winthrop F.

PY - 2001/12/1

Y1 - 2001/12/1

N2 - A single-stage dilution system has been designed to simulate the process of engine exhaust dilution in the atmosphere. An exhaust sample stream is introduced into a partial flow tunnel where it is diluted at a controlled rate. Temperature, relative humidity, dilution ratio and rate, and residence time are all adjustable. The system includes a turbulence generator to adjust the intensity of turbulence in the tunnel and a wake disk to control the initial mixing rate. Numerical methods were used to simulate flow fields, velocity fields, and mixing profiles for gases and particles. Mixing profiles for a gaseous tracer and particles of different sizes were also determined experimentally and compared with the model predictions. Critical parameters that influence mixing profiles and dilution rates predicted by modeling were demonstrated experimentally. Predicted and measured normalized mixing profiles were found to be in good agreement.

AB - A single-stage dilution system has been designed to simulate the process of engine exhaust dilution in the atmosphere. An exhaust sample stream is introduced into a partial flow tunnel where it is diluted at a controlled rate. Temperature, relative humidity, dilution ratio and rate, and residence time are all adjustable. The system includes a turbulence generator to adjust the intensity of turbulence in the tunnel and a wake disk to control the initial mixing rate. Numerical methods were used to simulate flow fields, velocity fields, and mixing profiles for gases and particles. Mixing profiles for a gaseous tracer and particles of different sizes were also determined experimentally and compared with the model predictions. Critical parameters that influence mixing profiles and dilution rates predicted by modeling were demonstrated experimentally. Predicted and measured normalized mixing profiles were found to be in good agreement.

UR - http://www.scopus.com/inward/record.url?scp=84877546973&partnerID=8YFLogxK

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U2 - 10.4271/2001-01-0207

DO - 10.4271/2001-01-0207

M3 - Paper

T2 - SAE 2001 World Congress

Y2 - 5 March 2001 through 8 March 2001

ER -

Single-stage dilution tunnel design

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