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Michikata Kono
University of Tokyo
CombustionAnalytical chemistryDrop (liquid)Ignition systemChemistry
205Publications
23H-index
1,526Citations
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Publications 192
Newest
#1Shinji Nakaya (UTokyo: University of Tokyo)H-Index: 9
#2Mitsuhiro Tsue (UTokyo: University of Tokyo)H-Index: 17
Last. Sadatake Tomioka (JAXA: Japan Aerospace Exploration Agency)H-Index: 14
view all 5 authors...
Abstract Supersonic combustion ramjet technology using liquid hydrocarbon fuels is invaluable due to great benefits of the energy density per unit volume and handling. This study carried out experiments to investigate the effects of the components in thermally cracked n-dodecane on ignition and supersonic combustion behavior at supersonic speeds (Mach 2.0) and at stagnation temperatures between 1800 K and 2400 K in a supersonic model combustor with a cavity flame holder. Components of the therma...
11 CitationsSource
#1Shinji Nakaya (UTokyo: University of Tokyo)H-Index: 9
#2Yuta Hikichi (UTokyo: University of Tokyo)H-Index: 1
Last. Sadatake Tomioka (JAXA: Japan Aerospace Exploration Agency)H-Index: 14
view all 8 authors...
Abstract This study carried out experiments to investigate the combustion behavior of ethanol at Mach 2.0 and stagnation temperatures between 1800 and 2200 K using a supersonic combustor with a cavity flame holder. The distribution of droplet diameters in fuel sprays was measured by a Laser Diffraction Spray Analyzer to estimate the vaporization time of fuel in the combustor. CH chemiluminescences and Schlieren photographs were measured by a video camera to identify the combustion mode and to me...
19 CitationsSource
#1Shinji Nakaya (UTokyo: University of Tokyo)H-Index: 9
#2Kotaro Fujishima (UTokyo: University of Tokyo)H-Index: 1
Last. Daisuke Segawa (OPU: Osaka Prefecture University)H-Index: 10
view all 5 authors...
Abstract The burning characteristics of isolated fuel droplets for ethanol, 1-butanol and n -decane were experimentally examined in carbon dioxide-rich or argon-rich environments under microgravity. The ambience consisted of oxygen, nitrogen, carbon dioxide and argon. The concentration of oxygen was fixed to be 21% in volume percentage, and that of carbon dioxide or argon was varied from 0% to 60% in volume percentage. Detailed measurements of the droplet surface areas were conducted using a hig...
11 CitationsSource
#1Osamu ImamuraH-Index: 7
#2Mitsuhiro TsueH-Index: 5
Last. Michikata KonoH-Index: 23
view all 3 authors...
Source
#1Osamu Imamura (UTokyo: University of Tokyo)H-Index: 7
#2Kiyotaka Yamashita (Colorado School of Mines)H-Index: 3
Last. Michikata Kono (UTokyo: University of Tokyo)H-Index: 23
view all 6 authors...
The combustion experiments of two droplets of n-octane arrayed in the direction of the electric field were carried out under microgravity. Experiments with different electrode distances are carried out and two individual flames were observed. The increase in the burning rate constant of the cathode-side flame was arranged reasonably using the representative electric body force, which was expressed by the product of the square of the applied voltage and the inverse cubic electrode distance from t...
5 CitationsSource
#1Shinji NakayaH-Index: 6
#2Kazuo HatoriH-Index: 2
Last. Toshikazu KadotaH-Index: 16
view all 6 authors...
A flame kernel initiation of methane/air combustible mixtures in the spark ignition process was investigated using a two-dimensional theoretical model including a detailed description of gas-phase chemical kinetics, shock capturing scheme and diffusive molecular transport. Interactions of chemical reactions and diffusive transports of radicals in the process of the flame kernel initiation were investigated. Although the model of plasma might be oversimplified, the qualitative behavior of OH for ...
9 CitationsSource
Source
#1Osamu Imamura (UTokyo: University of Tokyo)H-Index: 6
#2Bo Chen (UTokyo: University of Tokyo)H-Index: 1
Last. Michikata KonoH-Index: 23
view all 6 authors...
Flames are affected by external electric fields because they contain ions and electrons. The movement of ions and electrons affects the external electric field owing to their charge. In this context, this paper discusses the change in the electric field on the basis of experimental results obtained at different electrode distances. Employing one-dimensional (1D) steady-state analysis, we assume that if the electric field is changed spatially, the effect of the electric field on combustion behavi...
Source
#1Mitsuhiro Tsue (UTokyo: University of Tokyo)H-Index: 17
#2Osamu Imamura (UTokyo: University of Tokyo)H-Index: 6
Last. Michikata Kono (UTokyo: University of Tokyo)H-Index: 23
view all 8 authors...
Abstract Combustion characteristics of liquid hydrocarbon fuels are studied in a model combustor of SCRAM jet engines. The Mach number and total pressure of main flow in the combustor are 2.0 and 0.38 MPa, respectively, and the total temperature is varied from 1800 to 2400 K. Five kinds of n -alkane fuels such as n -heptane, n -octane, n -decane, n -tridecane and n -hexadecane are employed in experiments. Fuels are injected with a carrier nitrogen gas perpendicular to the mail flow in the combus...
5 CitationsSource
#1Osamu Imamura (UTokyo: University of Tokyo)H-Index: 6
#2Bo Chen (UTokyo: University of Tokyo)H-Index: 1
Last. Michikata Kono (UTokyo: University of Tokyo)H-Index: 23
view all 6 authors...
Abstract Flame is affected by an external electric field because it contains ions and electrons related to chemical reactions. On the other hand, the movement of ions and electrons affects the external electric field due to their charge. This paper reports the combustion experiments of ethanol droplets in vertical electric field with variable distance electrodes apparatus in order to discuss the change of the external electric field due to the existence of flame. From a one-dimensional steady-st...
6 CitationsSource
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