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Hiroyuki Hiroyasu
Institute of Industrial Technology, Kinki University, Higashi-Hiroshima, Japan

Keiya Nishida
Department of Mechanical System Engineering, University of Hiroshima, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan

Mamoru Suzuki
Ibaraki College of Technology, 866 Nakane, Katuta-shi, Ibaraki-ken 312 Japan


Relatively novel combustion chamber geometries, whose designs generally include a piston with a bowl and a small projection in the middle of the bowl for direct injection stratified charge (DISC) and diesel engines, have been suggested by Tanasawa et al. [1] and, recently, by Kato and Onishi [2]. The basic geometry exhibits a raised surface at or near the center of the piston bowl, onto which some or all of the fuel spray impacts. The liquid which impacts the raised surface is expected to provide a centrally located cloud of fuel drops and fuel vapor which will enhance the subsequent combustion event.
To date, the dispersion processes of the spray impinging on a flat end of a round projection (an impinged stick) in a high pressure unheated bomb have been extensively studied experimentally by us [3]. Here, we present the application of spray image processing of focused shadow images combined with the computerized tomographic transformation (CT method) to the analyses of the internal structure and the Sauter mean diameter (SMD) of the impinging spray. A set of experiments has been performed for clarifying the effects of impingement conditions, such as the diameter of the impinged stick and the distance from the nozzle to the impinged stick.

ICHMT Digital Library

Bow shocks on a jet-like solid body shape. Thermal Sciences 2004, 2004. Pulsed, supersonic fuel jets - their characteristics and potential for improved diesel engine injection. PULSED, SUPERSONIC FUEL JETS - THEIR CHARACTERISTICS AND POTENTIAL FOR IMPROVED DIESEL ENGINE INJECTION
View of engine compartment components (left). Plots of temperature distributions in centreplane, forward of engine (right). CHT-04 - Advances in Computational Heat Transfer III, 2004. Devel... DEVELOPMENT AND CURRENT STATUS OF INDUSTRIAL THERMOFLUIDS CFD ANALYSIS
Pratt & Whitney's F-135 Joint Strike Fighter Engine under test in Florida is a 3600F class jet engine. TURBINE-09, 2009. Turbine airfoil leading edge stagnation aerodynamics and heat transfe... TURBINE AIRFOIL LEADING EDGE STAGNATION AERODYNAMICS AND HEAT TRANSFER - A REVIEW
Refractive index reconstructed field. (a) Second iteration. (b) Fourth iteration. Radiative Transfer - VI, 2010. Theoretical development for refractive index reconstruction from a radiative ... THEORETICAL DEVELOPMENT FOR REFRACTIVE INDEX RECONSTRUCTION FROM A RADIATIVE TRANSFER EQUATION-BASED ALGORITHM
Two inclusion test, four collimated sources. Radiative Transfer - VI, 2010. New developments in frequency domain optical tomography. Part II. Application with a L-BFGS associated to an inexa... NEW DEVELOPMENTS IN FREQUENCY DOMAIN OPTICAL TOMOGRAPHY. PART II. APPLICATION WITH A L-BFGS ASSOCIATED TO AN INEXACT LINE SEARCH