%0 Journal Article
%T OXV-HYDROGEN COMBUSTION AND DETONATION DRIVEN SHOCK TUBE<br>氢氧燃烧及爆轰驱动激波管
%A YuHongru
%A <br>俞鸿儒
%J 力学学报
%D 1999
%I 
%X The performance of oxy-hydrogen combustion (deflagration) driver ignited by multiple spark plugs distributed along axis direction were analysed and observed. The causes for low quality of test flow produced by the combustion driver have been found. An improved ignition means with three ignitors at main diaphragm has been developed, by which the incident shock waves with repeatability can be produced and the steadiness of the pressure temperature and velocity of the flow behind the incident shock were improved. Experience has shown that deflagrative combustion is very difficult to achieve at high pressure. An alternative form of combustion drive is using a detonation wave which is initiated near the main diaphragm propagates toward the end of the driver. While it arrives to the end closure, a reflected shock wave is formed. The von Neumann spike in the reflected region is very high. Such high load may seriously jeopardize the structure of the driver in case of high initial pressure. A buffer tube attached to the end of the detonation driver for eliminating high reflected pressure was proposed, which lead to the result that the backward detonation driver can produce high enthalpy and high pressure test flow. By means of the reflected shock wave formed at the convergent section near the main diaphragm to mitigate the pernicious effects of the Taylor rarefaction following a detonation wave, the forward detonation driver becomes practically feasible. For the same shock Mach number, the required initial pressure of the detonable mixture for forward detonation driver is lower than that for backward detonation driver by nearly one order of magnitude.
%K combustion driver
%K detonation driver
%K gaseous detonation
%K shock tube
%K shock tunnel<br>燃烧驱动
%K 爆轰驱动
%K 气体爆轰
%K 激波管
%K 激波风洞
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=4100DA4A1A3BA1B0CE5AD99AE1DFB420&aid=38F1B0F94218C2E0&yid=B914830F5B1D1078&vid=4AD960B5AD2D111A&iid=E158A972A605785F&sid=40862C82D74F7473&eid=21D8CE17EE5EE354&journal_id=0459-1879&journal_name=力学学报&referenced_num=0&reference_num=25