Experimental and Numerical Study of Swirling ... - Solid Mechanics

Experimental and Numerical Study of Swirling Flow in Scavenging Process for 2-Stroke
Marine Diesel Engines
Preface
This dissertation is submitted in partial fulfillment of the requirement for the
degree of Doctor of Philosophy in Mechanical Engineering. The dissertation
is based on the research work carried out during the period from 2006 to
2010 at the Technical University of Denmark (DTU). The work was carried
out under the supervision of Associate Professor Knud Erik Meyer, Associate
Professor Jesper Schramm and Assistant Professor Dalibor Cavar along with
useful suggestions from Professor Valery Okulov and PhD Stefan Mayer
Manager Basic Research at MAN Diesel & Turbo.
The dissertation consists of six chapters excluding the conclusions and
appendices. Bibliography is given after the summary and conclusions.
Chapter 1 gives and introduction to the scavenging process in two stroke
marine diesel engines and identifies the scope of the work. Chapter 2
provides a brief overview of swirling flows based on theoretical and
experimental work from scientific literature. Chapter 3 gives a description of
the experimental test model used in this research work. Chapter 4 presents
the results of the first stereoscopic PIV experiment where the length of the
cylinder is changed. Chapter 5 gives the results from second experiment
where the measurements are conducted at different intake port closures
while keeping the cylinder length constant. Chapter 6 provides the
description and results of the numerical simulations carried out. Finally the
Summary and conclusions will summarize the results of the research work
and point out the potential future work. Due to limited space, all the results
from the experiments in Chapter 4 & 5 could not be given in the respective
chapters and are instead given in Appendix A & B respectively. Appendix C
includes the manuscript of the article ready to be submitted to a related
scientific journal.