Fuel Droplet Evaporation by Radiative Heating

辐射加热燃料滴蒸发

基本信息

  • 批准号:
    15560688
  • 负责人:
  • 金额:
    $ 2.18万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
  • 财政年份:
    2003
  • 资助国家:
    日本
  • 起止时间:
    2003 至 2005
  • 项目状态:
    已结题

项目摘要

Single-droplet evaporation by radiative heating has been studied experimentally. A suspended droplet of n-heptane, ethanol or water was employed in the experiments. A CO_2 laser was used as a radiative heat source. An X-type suspender made of gold wires of 10 □m in diameter was employed, which well reflects the CO_2 laser light. Radiative power density was varied up to 1.34 W/mm^2. Evaporation behavior of a droplet was recorded with a high-speed video camera. Temporal variations of the droplet diameter were measured from sequential images of a droplet with a PC software developed.It was observed that, in the case of n-heptane, droplet diameter decreases rapidly after the initial heat-up period, and then decreases slowly. In the case of ethanol and water, the slope of droplet diameter history is almost constant. It was suggested that, roughly, water and ethanol absorb the radiative energy in proportion to the area of a droplet, and n-heptane absorbs the radiative energy in proportion to the volume of a droplet. In case of n-heptane and ethanol, droplet explosion was observed at high radiative power densities and large initial droplet diameters. The time required for droplet diameter to become half, the half-diameter period, was employed as a measure of evaporation rate. The half-diameter period increases with the increase in the initial droplet diameter and decreases with the increase in the radiative power density. In the case of water and ethanol, the half-diameter period is almost proportional to the initial droplet diameter at high radiative power densities. The inverse of the half-diameter period increases almost proportionally to the radiative power density at low radiative power densities. The slop of the inverse of the half-diameter period is smaller at high radiative power densities than at low radiative power densities.
对辐射加热单液滴蒸发进行了实验研究。实验中使用了正庚烷、乙醇或水的悬浮液滴。用CO_2激光器作为辐射热源。采用直径10米的金丝制成的X型吊杆,对CO_2激光有很好的反射效果。辐射功率密度最高可达1.34W/mm~2。用高速摄像机记录了液滴的蒸发行为。利用开发的PC软件从液滴的序列图像中测量了液滴直径的时间变化,观察到在正庚烷的情况下,液滴直径在初始升温阶段后迅速减小,然后缓慢减小。在乙醇和水的情况下,液滴直径历史的斜率几乎是恒定的。有人认为,粗略地说,水和乙醇与液滴面积成比例地吸收辐射能量,正庚烷与液滴体积成比例地吸收辐射能量。对于正庚烷和乙醇,在较高的辐射功率密度和较大的初始液滴直径下,液滴发生爆炸。液滴直径减半所需的时间,即半直径周期,被用来衡量蒸发速度。半径周期随初始液滴直径的增大而增大,随辐射功率密度的增大而减小。在水和乙醇的情况下,在高辐射功率密度下,半直径周期几乎与初始液滴直径成比例。在较低的辐射功率密度下,半直径周期的倒数几乎与辐射功率密度成正比。在高辐射功率密度下,半直径周期逆周期的斜率比在低辐射功率密度下要小。

项目成果

期刊论文数量(16)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Experiments of Flame Spread on Three-Fuel-Droplet Array with a Pendulum Suspender and PTV Measurements of Flow Field
摆式悬架三燃料液滴阵列火焰传播实验及流场PTV测量
液滴移動が液滴列燃え広がり速度に及ぼす影響
液滴运动对液滴序列火焰蔓延速率的影响
アルコール燃料液滴の放射加熱蒸発
酒精燃料液滴的辐射加热蒸发
炭醜ガスレーザを用いた燃料液滴の放射加熱実験
煤气激光器燃料液滴辐射加热实验
Observation of Droplet Motion during Flame Spread on Three-Fuel-Droplet Array with a Pendulum Suspender
用摆式悬吊装置观察三燃料液滴阵列火焰传播过程中的液滴运动
  • DOI:
  • 发表时间:
    2004
  • 期刊:
  • 影响因子:
    0
  • 作者:
    瀧川仁志;野村浩司;氏家康成;Hiroshi Nomura
  • 通讯作者:
    Hiroshi Nomura
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NOMURA Hiroshi其他文献

Quantitation of neonicotinoid metabolites in human urine using gas chromatography-mass spectrometry
使用气相色谱-质谱法定量人尿液中的新烟碱类代谢物
  • DOI:
  • 发表时间:
    2013
  • 期刊:
  • 影响因子:
    0
  • 作者:
    NOMURA Hiroshi;UEYAMA Jun;KONDO Takaaki;SAITO Isao;MURATA Katsuyuki;IWATA Toyoto;WAKUSAWA Shinya;KAMIJIMA Michihiro
  • 通讯作者:
    KAMIJIMA Michihiro
Concentration distribution of urinary pyrethroid insecticide metabolites in Japanese workers
日本工人尿液中拟除虫菊酯类杀虫剂代谢物浓度分布
  • DOI:
  • 发表时间:
    2013
  • 期刊:
  • 影响因子:
    0
  • 作者:
    UEYAMA Jun;NOMURA Hiroshi;SAITO Isao;KONDO Takaaki;SUGIURA Yuka;MURATA Katsuyuki;IWATA Toyoto;GOTOH Masahiro;WAKUSAWA Shinya;KAMIJIMA Michihiro
  • 通讯作者:
    KAMIJIMA Michihiro

NOMURA Hiroshi的其他文献

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{{ truncateString('NOMURA Hiroshi', 18)}}的其他基金

Neural activity for reactivating forgotten memories
重新激活遗忘记忆的神经活动
  • 批准号:
    20H03551
  • 财政年份:
    2020
  • 资助金额:
    $ 2.18万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Elucidation of the neural mechanisms that reactivate memory cell assembly across a wide brain area
阐明重新激活整个大脑区域的记忆细胞组装的神经机制
  • 批准号:
    20K21557
  • 财政年份:
    2020
  • 资助金额:
    $ 2.18万
  • 项目类别:
    Grant-in-Aid for Challenging Research (Exploratory)
Study on Reactor for Fuel Cell/Gas Turbine Combined Electric Power Generator for Airplane
飞机燃料电池/燃气轮机联合发电机电抗器的研究
  • 批准号:
    15K06608
  • 财政年份:
    2015
  • 资助金额:
    $ 2.18万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Mechanisms underlying selection of neuronal population for learning and memory
学习和记忆神经元群体选择的机制
  • 批准号:
    25830002
  • 财政年份:
    2013
  • 资助金额:
    $ 2.18万
  • 项目类别:
    Grant-in-Aid for Young Scientists (B)
Amygdala functional network underlying fear extinction
杏仁核功能网络是恐惧消退的基础
  • 批准号:
    23700367
  • 财政年份:
    2011
  • 资助金额:
    $ 2.18万
  • 项目类别:
    Grant-in-Aid for Young Scientists (B)
Systematic pressure measurement and histological analysis of rat Lymphedema model and LVA model
大鼠淋巴水肿模型和LVA模型的系统压力测量和组织学分析
  • 批准号:
    21791749
  • 财政年份:
    2009
  • 资助金额:
    $ 2.18万
  • 项目类别:
    Grant-in-Aid for Young Scientists (B)
Experiments and Numerical Simulation on Fuel Droplet Evaporation and Explosion Caused by Radiation Heating
辐射加热引起燃料液滴蒸发爆炸的实验与数值模拟
  • 批准号:
    19560213
  • 财政年份:
    2007
  • 资助金额:
    $ 2.18万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Traditional Industry and Community Life Structure a case of Nishijin district in Kyoto
传统产业与社区生活结构——以京都市西阵区为例
  • 批准号:
    60450031
  • 财政年份:
    1985
  • 资助金额:
    $ 2.18万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)

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On the Impacts of Cloud Radiative Heating on General Circulation and Extreme Events
云辐射加热对大气环流和极端事件的影响
  • 批准号:
    1813981
  • 财政年份:
    2018
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Improved Modelling of Radiative Heating Effects for Hypersonic Planetary Entry Vehicles
高超声速行星进入飞行器辐射热效应的改进建模
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    2135006
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    2016
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The seasonal radiative heating features of the polar Tropopause Inversion Layer (TIL)
极地对流层顶逆温层(TIL)的季节性辐射加热特征
  • 批准号:
    434604-2012
  • 财政年份:
    2012
  • 资助金额:
    $ 2.18万
  • 项目类别:
    University Undergraduate Student Research Awards
DNS-LES pore scale simulation of thermal multi-component, multi-phase flow including radiative heating
热多组分、多相流(包括辐射加热)的 DNS-LES 孔隙尺度模拟
  • 批准号:
    77043693
  • 财政年份:
    2008
  • 资助金额:
    $ 2.18万
  • 项目类别:
    Research Units
An Airborne Study of Atmospheric Radiative Heating During The Arabian Sea Component of Monex
莫内克斯阿拉伯海部分大气辐射加热的机载研究
  • 批准号:
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  • 财政年份:
    1978
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    $ 2.18万
  • 项目类别:
    Continuing Grant
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