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高壓渦旋噴油器噴霧撞壁機(jī)理研究
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Characteristic of GDI High-pressure Swirl Injector
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    摘要:

    為了研究直噴式汽油機(jī)高壓渦旋噴油器噴霧撞壁機(jī)理,,測(cè)量了撞壁噴霧的高度,、噴霧半徑及噴霧遠(yuǎn)端速度,分析了不同噴射壓力、環(huán)境背壓,、噴嘴到壁面的距離、壁面傾角等因素對(duì)撞壁噴霧的影響,。隨著噴射壓力,、噴嘴到壁面的距離及壁面傾角的增加,噴霧的貫穿距離增大,;環(huán)境背壓的增大導(dǎo)致噴霧的貫穿距離減小,。較高的噴射壓力和較低的環(huán)境背壓增大了撞壁燃油與壁面的接觸面積,在壁面上形成的薄膜加速了燃油的蒸發(fā),。由經(jīng)驗(yàn)公式計(jì)算得到的撞壁噴霧貫穿距離與試驗(yàn)測(cè)量值在一定范圍內(nèi)具有一致性,,為燃燒室的設(shè)計(jì)、進(jìn)氣道形式的選取,、噴油器和火花塞的布局提供了試驗(yàn)依據(jù),。

    Abstract:

    The characteristics of gasoline spray after wall impingement from a high-pressure gasoline direct injection injector were investigated. To examine the effects of various factors on the impingement development, experiments were conducted at different injection pressures, ambient pressures, wall distances and angles. The impinging spray development, spray height, spray radius, and spray growth rate were measured. Experimental results show that the spray penetration increases with the increase of injection pressure, wall distance and angle. The penetration decreases with the increase of ambient pressure. High injection pressure and low ambient pressure increased the fuel contact area and accelerated the evaporation. The predicted penetrations with the empirical equations in all cases agree with measurements, to a certain extent.

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李波,李云清,王德福.高壓渦旋噴油器噴霧撞壁機(jī)理研究[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2010,41(9):18-21. Characteristic of GDI High-pressure Swirl Injector[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(9):18-21.

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