Velocity distribution effects in air filter testing

Frank W. Chambers; Abdel Al-Sarkhi; Shenghong Yao

doi:10.1080/0272-630191899733

Velocity distribution effects in air filter testing

Frank W. Chambers
, Abdel Al-Sarkhi
, Shenghong Yao

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

The velocity through an air filter is a fundamental parameter in the efficiency and pressure drop of the filter. We have measured velocity distributions approaching filters mounted in a range of housings and used an efficiency model to predict efficiencies. The housings have included the universal housing of the SAE J726 Air Cleaner Test Code, a duct similar to those used with the SAE J1669 Passenger Compartment Air Filter Test Code, and models of vehicular housings. The velocity measurements show that velocity approaching the filter is not uniform and the efficiency estimates show that this non-uniformity can have small but significant effects upon the clean filter performance predicted by the efficiency model. The model assumes that the local flow is uniformly distributed over the face of the pleats, and velocity variations within the pleat are not considered. The question of how results following test standards are influenced by velocity field variations is examined. The related questions of whether filter test duct configurations should be rigidly prescribed, and how laboratory test housing and vehicular housing results compare are addressed. The predicted effects of non-uniform velocity fields on measurements of fractional efficiency and gravimetric efficiency are compared.

Original language	English
Pages (from-to)	1-21
Number of pages	21
Journal	Particulate Science and Technology
Volume	19
Issue number	1
DOIs	https://doi.org/10.1080/0272-630191899733
State	Published - 2001
Externally published	Yes

Bibliographical note

Funding Information:
The authors wish to thank the Oklahoma Center for the Advancement of Science and Technology Applied Research Program and Purolator Products, Inc. for their support through the course of the research program. To the first author in particular, the advice and encouragement of Mr. A. MacLean, Dr. G.B. Ferrell, Dr. T. Jaroszczyk, and Dr. T. Ptak have been of great benefit. The first author also would like to acknowledge the many contributions of earlier students who have been involved in the project, notably R. Sabnis, Q. Cai, R. Duran, G. Liu, R.A. Newman, and C.B. Tebbutt. The experimental assistance and cooperation of Dr. R.L. Dougherty and his graduate research assistants also are sincerely appreciated. The assistance of Aerometrics, Inc. with the LDA system is gratefully acknowledged.

ASJC Scopus subject areas

General Chemical Engineering

Access to Document

10.1080/0272-630191899733

Cite this

@article{90cf0049e3b44c09bca3cbd001cc8d82,

title = "Velocity distribution effects in air filter testing",

abstract = "The velocity through an air filter is a fundamental parameter in the efficiency and pressure drop of the filter. We have measured velocity distributions approaching filters mounted in a range of housings and used an efficiency model to predict efficiencies. The housings have included the universal housing of the SAE J726 Air Cleaner Test Code, a duct similar to those used with the SAE J1669 Passenger Compartment Air Filter Test Code, and models of vehicular housings. The velocity measurements show that velocity approaching the filter is not uniform and the efficiency estimates show that this non-uniformity can have small but significant effects upon the clean filter performance predicted by the efficiency model. The model assumes that the local flow is uniformly distributed over the face of the pleats, and velocity variations within the pleat are not considered. The question of how results following test standards are influenced by velocity field variations is examined. The related questions of whether filter test duct configurations should be rigidly prescribed, and how laboratory test housing and vehicular housing results compare are addressed. The predicted effects of non-uniform velocity fields on measurements of fractional efficiency and gravimetric efficiency are compared.",

author = "Chambers, \{Frank W.\} and Abdel Al-Sarkhi and Shenghong Yao",

note = "Funding Information: The authors wish to thank the Oklahoma Center for the Advancement of Science and Technology Applied Research Program and Purolator Products, Inc. for their support through the course of the research program. To the first author in particular, the advice and encouragement of Mr. A. MacLean, Dr. G.B. Ferrell, Dr. T. Jaroszczyk, and Dr. T. Ptak have been of great benefit. The first author also would like to acknowledge the many contributions of earlier students who have been involved in the project, notably R. Sabnis, Q. Cai, R. Duran, G. Liu, R.A. Newman, and C.B. Tebbutt. The experimental assistance and cooperation of Dr. R.L. Dougherty and his graduate research assistants also are sincerely appreciated. The assistance of Aerometrics, Inc. with the LDA system is gratefully acknowledged.",

year = "2001",

doi = "10.1080/0272-630191899733",

language = "English",

volume = "19",

pages = "1--21",

journal = "Particulate Science and Technology",

issn = "0272-6351",

publisher = "Taylor and Francis Ltd.",

number = "1",

}

TY - JOUR

T1 - Velocity distribution effects in air filter testing

AU - Chambers, Frank W.

AU - Al-Sarkhi, Abdel

AU - Yao, Shenghong

N1 - Funding Information: The authors wish to thank the Oklahoma Center for the Advancement of Science and Technology Applied Research Program and Purolator Products, Inc. for their support through the course of the research program. To the first author in particular, the advice and encouragement of Mr. A. MacLean, Dr. G.B. Ferrell, Dr. T. Jaroszczyk, and Dr. T. Ptak have been of great benefit. The first author also would like to acknowledge the many contributions of earlier students who have been involved in the project, notably R. Sabnis, Q. Cai, R. Duran, G. Liu, R.A. Newman, and C.B. Tebbutt. The experimental assistance and cooperation of Dr. R.L. Dougherty and his graduate research assistants also are sincerely appreciated. The assistance of Aerometrics, Inc. with the LDA system is gratefully acknowledged.

PY - 2001

Y1 - 2001

N2 - The velocity through an air filter is a fundamental parameter in the efficiency and pressure drop of the filter. We have measured velocity distributions approaching filters mounted in a range of housings and used an efficiency model to predict efficiencies. The housings have included the universal housing of the SAE J726 Air Cleaner Test Code, a duct similar to those used with the SAE J1669 Passenger Compartment Air Filter Test Code, and models of vehicular housings. The velocity measurements show that velocity approaching the filter is not uniform and the efficiency estimates show that this non-uniformity can have small but significant effects upon the clean filter performance predicted by the efficiency model. The model assumes that the local flow is uniformly distributed over the face of the pleats, and velocity variations within the pleat are not considered. The question of how results following test standards are influenced by velocity field variations is examined. The related questions of whether filter test duct configurations should be rigidly prescribed, and how laboratory test housing and vehicular housing results compare are addressed. The predicted effects of non-uniform velocity fields on measurements of fractional efficiency and gravimetric efficiency are compared.

AB - The velocity through an air filter is a fundamental parameter in the efficiency and pressure drop of the filter. We have measured velocity distributions approaching filters mounted in a range of housings and used an efficiency model to predict efficiencies. The housings have included the universal housing of the SAE J726 Air Cleaner Test Code, a duct similar to those used with the SAE J1669 Passenger Compartment Air Filter Test Code, and models of vehicular housings. The velocity measurements show that velocity approaching the filter is not uniform and the efficiency estimates show that this non-uniformity can have small but significant effects upon the clean filter performance predicted by the efficiency model. The model assumes that the local flow is uniformly distributed over the face of the pleats, and velocity variations within the pleat are not considered. The question of how results following test standards are influenced by velocity field variations is examined. The related questions of whether filter test duct configurations should be rigidly prescribed, and how laboratory test housing and vehicular housing results compare are addressed. The predicted effects of non-uniform velocity fields on measurements of fractional efficiency and gravimetric efficiency are compared.

UR - https://www.scopus.com/pages/publications/85047698780

U2 - 10.1080/0272-630191899733

DO - 10.1080/0272-630191899733

M3 - Article

AN - SCOPUS:85047698780

SN - 0272-6351

VL - 19

SP - 1

EP - 21

JO - Particulate Science and Technology

JF - Particulate Science and Technology

IS - 1

ER -

Velocity distribution effects in air filter testing

Abstract

Bibliographical note

ASJC Scopus subject areas

Access to Document

Fingerprint

Cite this