Freezing Dilution Mini-Tunnel as a Sampling Method for Diesel Particulates

G. Takeshi Sato; Katsuo Imazuka; Takashi Sawada; Norimasa Iida

doi:10.1299/kikaib.51.1113

Freezing Dilution Mini-Tunnel as a Sampling Method for Diesel Particulates

G. Takeshi Sato, Katsuo Imazuka, Takashi Sawada, Norimasa Iida

Department of System Design Engineering

Research output: Contribution to journal › Article

Abstract

A freezing dilution mini-tunnel method is described which allows sampling of diesel exhaust particulates with independent control of the diluted gas temperature T_d and collecting mesh surface temperature T_w. Particulates in the diluted gas are caught on the cooled mesh surface kept the low temperature with liquid air at T_w. This tunnel was examined to determine the individual effect of these two operating variables T_d, T_w on the samples collected just behind an exhaust valve of a single-cylinder direct-injection test engine run at constant speed and load. Either decreasing diluted gas temperature or sampling mesh surface temperature resulted in an increase of particulate diameter and coagulation of liquidwise particulates and cohesion of particulates.

Original language	English
Pages (from-to)	1113-1120
Number of pages	8
Journal	Transactions of the Japan Society of Mechanical Engineers Series B
Volume	51
Issue number	463
DOIs	https://doi.org/10.1299/kikaib.51.1113
Publication status	Published - 1985 Jan 1

Keywords

Black Smoke
Combustion
Diesel Engine
Diesel Particulate
Dilution Tunnel
Internal Combustion Engine
Sampling Method
Soot

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering

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Sato, G. T., Imazuka, K., Sawada, T., & Iida, N. (1985). Freezing Dilution Mini-Tunnel as a Sampling Method for Diesel Particulates. Transactions of the Japan Society of Mechanical Engineers Series B, 51(463), 1113-1120. https://doi.org/10.1299/kikaib.51.1113

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abstract = "A freezing dilution mini-tunnel method is described which allows sampling of diesel exhaust particulates with independent control of the diluted gas temperature Td and collecting mesh surface temperature Tw. Particulates in the diluted gas are caught on the cooled mesh surface kept the low temperature with liquid air at Tw. This tunnel was examined to determine the individual effect of these two operating variables Td, Tw on the samples collected just behind an exhaust valve of a single-cylinder direct-injection test engine run at constant speed and load. Either decreasing diluted gas temperature or sampling mesh surface temperature resulted in an increase of particulate diameter and coagulation of liquidwise particulates and cohesion of particulates.",

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