Effects of the initial heat-up period on a two-droplet array burning at high pressure in microgravity

Keiichi Okai; Yutaka Ono; Osamu Moriue; Hideaki Kato; Mitsuhiro Tsue; Michikata Kono; Jun'Ichi Sato; Daniel L. Dietrich; Forman A. Wiliams

doi:10.1299/jsmeb.43.485

Effects of the initial heat-up period on a two-droplet array burning at high pressure in microgravity

Keiichi Okai, Yutaka Ono, Osamu Moriue, Hideaki Kato, Mitsuhiro Tsue, Michikata Kono, Jun'Ichi Sato, Daniel L. Dietrich, Forman A. Wiliams

Research output: Contribution to journal › Article › peer-review

Abstract

The interactive combustion of two closely-spaced droplets at elevated pressures was investigated experimentally in a 2.2 second drop tower. Heptane, hexadecane and mixtures of the two were the fuel. A nitrogen-oxygen ambient with a relatively low oxygen concentration facilitated observation of droplets during combustion at elevated pressures. Results show that staged combustion of binary fuel droplets still exists for interacting droplets at elevated pressures. For pure fuels, the interaction effects are principally observed during the initial heating period. For fuel mixtures, interaction effects are estimated by comparing the transition time of a single droplet to that of the droplet pair.

Original language	English
Pages (from-to)	485-490
Number of pages	6
Journal	JSME International Journal, Series B: Fluids and Thermal Engineering
Volume	43
Issue number	3
DOIs	https://doi.org/10.1299/jsmeb.43.485
Publication status	Published - 2000
Externally published	Yes

All Science Journal Classification (ASJC) codes

Mechanical Engineering
Physical and Theoretical Chemistry
Fluid Flow and Transfer Processes

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10.1299/jsmeb.43.485

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title = "Effects of the initial heat-up period on a two-droplet array burning at high pressure in microgravity",

abstract = "The interactive combustion of two closely-spaced droplets at elevated pressures was investigated experimentally in a 2.2 second drop tower. Heptane, hexadecane and mixtures of the two were the fuel. A nitrogen-oxygen ambient with a relatively low oxygen concentration facilitated observation of droplets during combustion at elevated pressures. Results show that staged combustion of binary fuel droplets still exists for interacting droplets at elevated pressures. For pure fuels, the interaction effects are principally observed during the initial heating period. For fuel mixtures, interaction effects are estimated by comparing the transition time of a single droplet to that of the droplet pair.",

author = "Keiichi Okai and Yutaka Ono and Osamu Moriue and Hideaki Kato and Mitsuhiro Tsue and Michikata Kono and Jun'Ichi Sato and Dietrich, {Daniel L.} and Wiliams, {Forman A.}",

year = "2000",

doi = "10.1299/jsmeb.43.485",

language = "English",

volume = "43",

pages = "485--490",

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T1 - Effects of the initial heat-up period on a two-droplet array burning at high pressure in microgravity

AU - Okai, Keiichi

AU - Ono, Yutaka

AU - Moriue, Osamu

AU - Kato, Hideaki

AU - Tsue, Mitsuhiro

AU - Kono, Michikata

AU - Sato, Jun'Ichi

AU - Dietrich, Daniel L.

AU - Wiliams, Forman A.

PY - 2000

Y1 - 2000

N2 - The interactive combustion of two closely-spaced droplets at elevated pressures was investigated experimentally in a 2.2 second drop tower. Heptane, hexadecane and mixtures of the two were the fuel. A nitrogen-oxygen ambient with a relatively low oxygen concentration facilitated observation of droplets during combustion at elevated pressures. Results show that staged combustion of binary fuel droplets still exists for interacting droplets at elevated pressures. For pure fuels, the interaction effects are principally observed during the initial heating period. For fuel mixtures, interaction effects are estimated by comparing the transition time of a single droplet to that of the droplet pair.

AB - The interactive combustion of two closely-spaced droplets at elevated pressures was investigated experimentally in a 2.2 second drop tower. Heptane, hexadecane and mixtures of the two were the fuel. A nitrogen-oxygen ambient with a relatively low oxygen concentration facilitated observation of droplets during combustion at elevated pressures. Results show that staged combustion of binary fuel droplets still exists for interacting droplets at elevated pressures. For pure fuels, the interaction effects are principally observed during the initial heating period. For fuel mixtures, interaction effects are estimated by comparing the transition time of a single droplet to that of the droplet pair.

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Effects of the initial heat-up period on a two-droplet array burning at high pressure in microgravity

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