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Comparisons of Particulate Size Dist...

Zhang, Yizhou.

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Comparisons of Particulate Size Distributions from Multiple Combustion Strategies.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Comparisons of Particulate Size Distributions from Multiple Combustion Strategies./
Author:	Zhang, Yizhou.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
Description:	199 p.
Notes:	Source: Dissertation Abstracts International, Volume: 78-06(E), Section: B.
Contained By:	Dissertation Abstracts International78-06B(E).
Subject:	Mechanical engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10254599
ISBN:	9781369509687

Comparisons of Particulate Size Distributions from Multiple Combustion Strategies.
Zhang, Yizhou.

Comparisons of Particulate Size Distributions from Multiple Combustion Strategies. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 199 p.

Source: Dissertation Abstracts International, Volume: 78-06(E), Section: B.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2017.

In this study, a comparison of particle size distribution (PSD) measurements from eight different combustion strategies was conducted at four different load-speed points. The PSDs were measured using a scanning mobility particle sizer (SMPS) together with a condensation particle counter (CPC). To study the influence of volatile particles, PSD measurements were performed with and without a volatile particle remover (thermodenuder, TD) at both low and high dilution ratios. The common engine platform utilized in the experiment helps to eliminate the influence of background particulate and ensures similarity in dilution conditions.

ISBN: 9781369509687Subjects--Topical Terms:

649730
Mechanical engineering.

Comparisons of Particulate Size Distributions from Multiple Combustion Strategies.
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245 1 0 $a Comparisons of Particulate Size Distributions from Multiple Combustion Strategies.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2017
300 $a 199 p.
500 $a Source: Dissertation Abstracts International, Volume: 78-06(E), Section: B.
500 $a Adviser: Jaal Ghandhi.
502 $a Thesis (Ph.D.)--The University of Wisconsin - Madison, 2017.
520 $a In this study, a comparison of particle size distribution (PSD) measurements from eight different combustion strategies was conducted at four different load-speed points. The PSDs were measured using a scanning mobility particle sizer (SMPS) together with a condensation particle counter (CPC). To study the influence of volatile particles, PSD measurements were performed with and without a volatile particle remover (thermodenuder, TD) at both low and high dilution ratios. The common engine platform utilized in the experiment helps to eliminate the influence of background particulate and ensures similarity in dilution conditions.
520 $a The results show a large number of volatile particles were present under LDR sample conditions for most of the operating conditions. The use of a TD, especially when coupled with HDR, was demonstrated to be effective at removing volatile particles and provided consistent measurements across all combustion strategies. The PSD comparison showed that gasoline premixed combustion strategies such as HCCI and GCI generally have low PSD magnitudes for particle sizes greater than the Particle Measurement Programme (PMP) cutoff diameter (23 nm), and the PSDs were highly nuclei-mode particle dominated. The strategies using diesel as the only fuel (DLTC and CDC) generally showed the highest particle number emissions for particles larger than 23 nm and had accumulation-mode particle dominated PSDs. A consistent correlation between the increase of the direct-injection of diesel fuel and a higher fraction of accumulation-mode particles was observed over all combustion strategies.
520 $a A DI fuel substitution study and injector nozzle geometry study were conducted to better understand the correlation between PSD shape and DI fueling. It was found that DI fuel properties has a clear impact on PSD behavior for CDC and NG DPI. Fuel with lower density and lower sooting tendency led to a nuclei-mode particle dominated PSD shape. For NG RCCI, accumulation-mode particle concentration was found to be insensitive to DI fuel properties. Similar PSD behavior of increased nuclei-mode particle fraction was also observed when a smaller orifice nozzle was used for CDC and NG DPI operation. For NG DPI, a reduction of DI fuel fraction generally led to a reduction in accumulation-mode particles.
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710 2 $a The University of Wisconsin - Madison. $b Mechanical Engineering. $3 2094221
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