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Research and Development of a Turbo-Charger-Aided, Forced-Ventilated Valveless Pulse Combustor

涡轮增压辅助强制通风无阀脉冲燃烧器的研制

基本信息

批准号：
01550173
负责人：
OHIWA Norio
金额：
$ 1.22万
依托单位：
Nagoya Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

项目摘要

In order to estimate the possibilty of co-generation systems with high thermal efficiency, such as gas turbines driven by a valveless pulse combustor, the following three systems are investigated experimentally: (1) an ordinary type valveless pulse combustor with forced air supply by a blower, (2) a single charged and forced ignited intermittent combustion, and (3) a twoーstep charged intermitーtent combustion with controlled ignition. The results obtaned are summarized as follows.(1) As a spark ignitor is continued to be applied, a transition of the combustion pattern from an ordinary pulse combustion to an intermittent explosive combustion with increasing air supply pressure. The latter pattern, named "Single charged and forced ignited intermittent combustion", can operate stably beyond the limit of the ordinary pulse combustion and have a mean combustion pressure considerably higher than that of the ordinary pulsation, being useful for driving a turbo-charger.(2) Combination of the forced ignited intermittent combustion with an ignitor with variable disーcharge frequency of 10-102Hz enables "Two-step charged intermittent combustion with controlled ignition", it operates at subーharmonics of discharge frequency ranging 10-34Hz.(3) The turboーcharger driven by a twoーstep charged, controlled ignited intermittent combustion exhibits positive and stable pressure boost, when operated at 1/3-subharmonics.According to the results, it can be said that the suggested controlled ignition mode of pulse combustion may become one of the useful combustors for constituting high efficiency coーgeneration systems, if such turbo-chargers that have the highest pressure ratios and the lowest flow rates could be obtained.

为了评价以无阀脉冲燃烧器驱动燃气轮机等高热效率热电联产系统的可能性，对以下三种系统进行了实验研究：（1）普通型无阀脉冲燃烧器，鼓风机强制送风;（2）单次充量强制点火间歇燃烧;所得结果总结如下。(1)当继续使用火花点火器时，随着空气供应压力的增加，燃烧模式从普通脉冲燃烧过渡到间歇爆炸燃烧。后者称为“单次充量强制点火间歇燃烧”，能在普通脉动燃烧极限之外稳定工作，平均燃烧压力远高于普通脉动燃烧，有利于驱动涡轮增压器。(2)将强制点火间歇燃烧与放电频率为10- 102 Hz的可变点火器相结合，实现了“可控点火两步充能间歇燃烧”，其工作频率为10- 34 Hz的次谐波。(3)由两级增压、可控点火间歇燃烧驱动的涡轮增压器，在1/3次谐波下工作时，具有正的、稳定的增压特性。结果表明，脉冲燃烧的可控点火方式可能成为构成高效CO_2发生系统的有用燃烧室之一。如果能够获得这种具有最高压力比和最低流速的涡轮增压器的话。