Reto Balz

Reto Balz
Paul Scherrer Institut | PSI · Research Department General Energy (ENE)

PhD

About

10
Publications
1,402
Reads
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118
Citations
Citations since 2016
7 Research Items
96 Citations
20162017201820192020202120220510152025
20162017201820192020202120220510152025
20162017201820192020202120220510152025
20162017201820192020202120220510152025
Additional affiliations
July 2021 - July 2021
Paul Scherrer Institut
Position
  • Engineer
December 2015 - June 2021
Winterthur Gas & Diesel
Position
  • Research Expert
October 2009 - September 2012
University of Applied Sciences and Arts Northwestern Switzerland
Position
  • Scientific Assistant
Education
March 2016 - December 2020
Chalmers University of Technology
Field of study
  • Thermo and Fuid Dynamics
October 2012 - December 2013
University of Bristol
Field of study
  • Advanced Mechanical Engineering
September 2006 - September 2009

Publications

Publications (10)
Article
Full-text available
As emission regulations for large two-stroke marine Diesel engines increase as well, the manufacturers face similar problems as small-sized engine builders. The fuel injection, spray formation and subsequent combustion process remain among the main drivers for emissions of direct-injection, compression-ignition internal combustion engines. Since th...
Article
Full-text available
To further increase the efficienc y and decrease emissions of large two-stroke marine Diesel engines, the understanding of the fuel injection, spray breakup and the resulting combustion plays a vital role. Investigations have shown that the strongly asymmetrically and eccentrically arranged nozzle bores of the fuel injectors can lead to undesirable...
Article
To further increase efficiency as well as to reduce emissions of large two-stroke marine Diesel engines, the understanding of the fuel injection processes and the resulting spray atomization characteristics is of high importance. The sheer dimensions, the uniflow scavenging design with the central exhaust valve position and the high swirl motion of...
Conference Paper
The completely asymmetrically and eccentrically arranged orifices in large marine two-stroke Diesel engine fuel injector nozzles lead to significant spray axis deviations and unusual flow interaction effects. These un-desired aberrations lead to reduced engine performance and are only limitedly researched and comparable, as injector nozzles from sm...
Conference Paper
Injector geometries of large marine two-stroke diesel engines differ extensively from configurations typically used in diesel engines for heavy duty and automotive applications. Fuel is usually injected into the cylinder using multiple injectors that are arranged around the cylinder wall. As a result, the injector orifices are asymmetrically arrang...
Article
A phenomenological model of the three-phase flow inside an abrasive water jet machining cutting head has been developed. Several improvements over previously presented models such as taking into account the abrasive particle size distribution, and the effect of breakage of particles on the energy flux have been made. The model has been validated us...
Article
Full-text available
Ultra-fast X-ray velocimetry measurements were taken to measure velocities and spatial positions of individual abrasive particles within the solid–liquid–gaseous three-phase flow of a high-pressure injection method–based abrasive water jet (AWJ). A synchrotron X-ray source provided sufficient photon flux to take double-frame images of the AWJ with...
Conference Paper
This paper presents the instrumentation of a commercial injection method based high-pressure abrasive water jet system (AWJ). Real-time measurement of water, air and abrasive mass flow rates is employed for near instant detection of performance changing events including water leakage, choking of abrasive particles, fluctuations of the abrasive mass...

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Projects

Project (1)
Project
To further understand the in-nozzle flow and how it affects the spray and as a result the combustion process in large two-stroke marine Diesel engines.