高马赫数燃烧强化的激波风洞试验研究

基于中国科学院力学研究所的JF-24激波风洞,通过开展高马赫数超燃冲压发动机的直连试验,研究了高马赫数燃烧的强化方法以及燃料类型对燃烧的影响.试验段是采用凹腔结构的圆截面燃烧室,喷孔布置在隔离段,燃料分别是氢气和乙烯,当量比均为0.7.燃料喷注分别采用无支板和小支板两种构型,后者部分喷孔位于小支板顶部.两种构型均设置了流向近距双排喷孔,可分别进行单环和双环喷注.试验结果论证了飞行马赫数10.0条件下氢气和乙烯在超高速气流中的稳定燃烧性能.并且,相比于单环喷注,双环喷注以及补充小支板可以强化燃烧.推测其原因是双环射流和激波/分离结构的近距离交互作用很可能改善掺混,而补充小支板顶部喷注还能利用更多空气组织掺混.在同样采用双环耦合小支板顶部喷注的强化措施下,氢气与乙烯燃烧效率接近,但氢推力性能更优.这是因为较高热值氢的释热更多.此外,试验还证明了在当前来流条件下,释热受控于掺混,且高温离解效应限制释热上限.这是由于释热降低流速且提高静温,使高温离解的吸热效应更加显著

新疆砾岩油藏提高开发效果示范工程油藏精细描述和剩余油分布研究

该课题将七中东区八道湾组自下而上划分为冲积扇-辫状河、辫状河、低弯度河三种沉积体系域；研究表明平面上的剩余油富集区在油藏北部断裂一带以及七东2-2区，剖面上剩余油富集在油藏下部；八区克上组油藏细分沉积相结果表明储层主要是扇三角洲前缘亚相的水下分流河道、河口砂坝沉积，研究表明八区克上组平面上的剩余油富集区在油藏北部邻近断裂的区域，剖面上富集在底部的两个单层；六东区克下组自下而上、由西向东均由扇顶亚相逐渐演变为扇缘亚相，发育于中西部地区的粗碎屑扇顶和扇中骨架微相是主力储层，认识到六东区克上组油藏采出程度低，剩余地质储量丰富；总结了新疆砾岩油藏剩余油富集规律，结果表明断层附近、原始地质储量大、低渗层段、原油高粘度区域是剩余油富集的部位

乌鲁木齐可持续发展战略综合减灾系统工程研究

该技术应用系统论和预测学以及协调模式理论对各种灾害的关联性和灾害对社会经济发展的影响等方面作了较为深入的研究,并采用系统论、控制论、信息论、突变论和耗散结构理论等观点在综合减灾行动进行应用,对灾害的预测、防御进行了思路的开阔和创新。同时应用信息科学和计算机技术建了立综合减灾数据库和信息管理系统,为乌鲁木齐防灾减灾行动及政府有关部门综合管理提供了操作性强的管理系统和信息服务系统。该技术对乌鲁木齐和自治区的综合减灾有重要应用价值和推广前景,对乌鲁木齐和自治区可持续发展战略的实施,对加快西部大开发的步伐和保障科学发展观的落实有重要的促进作用

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies