摘要：皖北地区明清老街文化建筑,作为重要的历史文化遗产,承载着人们对历史的记忆,体现出一个区域的文脉。老街建筑的保护与更新改造是皖北城市旅游和地区文化可持续发展的重要保障。以亳州明清老街改造为例,研究亳州明清老街建筑文化及其存在的一些问题,分析明清老街建筑艺术形态空间特征,通过多元空间重构方式来改造和更新设计,为皖北老街文化建筑保护与更新提供一些思考与启示,从而实现明清老街文化建筑的设计更新和文脉延续。

摘要：中原地区某皮草公司内皮革废料及其厂区污水处理厂所产污泥原采用填埋模式处置,但存在较多弊端,影响该公司的正常运行。通过对我国多种污泥混合掺烧案例以及处理物料的性质进行分析后,确定污泥与皮革废料混合焚烧是最为合适的处置工艺。通过对燃烧工况进行理论分析,确定采用皮革预处理+污泥干化+焚烧+烟气净化工艺处置路线及布置方案。通过碳减排计算,采用固废混合焚烧后,较原填埋处置工艺减少CO_(2)排放量约7.594×10^(4) t/a。试运行阶段可满足混合物的自持燃烧,烟气经处理后达标排放,基本达到污泥(包括其他皮革混合物料)减量化、稳定化、无害化的设计要求。

摘要：BIM(Building Information Modeling)系统是近些年大型交通工程、建筑工程领域逐渐推广的重要发展理念,Civil 3D、Revit等通用软件的应用引起了工程设计领域的重大变革。本文重点介绍了Civil 3D技术在水土保持淤地坝除险加固工程设计中的具体应用,利用BIM系统的强大建模及管理功能,可以实现设计方案比选更加直观、技术论证更加合理、工程量分析计算更加精准、设计效率更加高效快捷的目的。

摘要：In order to shorten aero-engine axial length,substituting the traditional long chord thick strut design accompanied with the traditional low pressure(LP) stage nozzle,LP turbine is integrated with intermediate turbine duct(ITD).In the current paper,five vanes of the first stage LP turbine nozzle is replaced with loaded struts for supporting the engine shaft,and providing oil pipes circumferentially which fulfilled the areo-engine structure ***,their bulky geometric size represents a more effective obstacle to flow from high pressure(HP) turbine *** five struts give obvious influence for not only the LP turbine nozzle but also the flowfield within the ITD,and hence cause higher *** investigation has been undertaken to observe the influence of the Nozzle-Strut integrated design concept on the flowfield within the ITD and the nearby nozzle *** to the computational results,three main conclusions are finally ***,a noticeable low speed area is formed near the strut's leading edge,which is no doubt caused by the potential flow ***,more severe radial migration of boundary layer flow adjacent to the strut's pressure side have been found near the nozzle's trailing *** boundary layer migration is obvious,especially close to the shroud ***,radial pressure gradient aggravates this ***,velocity distribution along the strut's pressure side on nozzle's suction surface differs,which means loading variation of the *** it will no doubt cause nonuniform flowfield faced by the downstream rotor blade.

摘要：With the aid of numerical method, both flow field and its accompanied loss mechanism within the rotating cavity are investigated in detail in the 1^(st) part of the two parts paper. For ease of comparison, rotating cavity is further classified as the rotor-stator cavity case and the rotor-rotor cavity case. Results indicate that flow within both kinds of the cavity act as the inviscid flow except that the flow near walls, neighboring the lower G region and in the vicinity of the rotating orifices. In the regions except such inviscid-flow-dominate domains, the theoretical core rotation factor can be safely used to predict the swirl ratio within the cavity. When detailed flow pattern is considered, Ekman-type flow exists near periphery of the surface's boundary layer where viscous effect is non-negligible. However, due to the complex profile of the simulated cavity case, vortices structure is varied within the cavity. By comparison, swirl ratio can be used to predict the magnitude of loss. due to the relatively evident rotating effects of the rotor-rotor cavity, swirl ratio even increases to 1.4 in the current model, which means that flow is moving faster than the surrounding disc. Further investigation finds that this kind of highly rotating flow is accompanied with serious undesirable pressure loss. Parenthetically, unlike its counterpart, swirl ratio above 1.0 doesn't happen when fluid passes through the rotor-stator cavity. So it is suggested that rotor-rotor flow cavity with the superimposed inward throughflow should be avoided in the engine design or certain measurements should be provided when such structure design is unavoidable. Simulation done in the current paper is meaningful since these dimensional parameters are typical in the design of state-of-art. Relatively lower range of Re_φ and C_w is not considered in the current two parts paper.

摘要：With the improvement of requirement,design and manufacture technology,aero-engines for the future are characterized by further reduction in fuel consumption,cost,but increment in propulsion efficiency,which leads to ultra-high bypass *** intermediate turbine duct(ITD),which connects the high pressure turbine(HPT) with the low pressure turbine(LPT),has a critical impact on the overall performances of such future ***,it becomes more and more urgent to master the design technique of aggressive,even super-aggressive *** the last years,a lot of research works about the flow mechanism in the diffuser ducts were carried *** achievements were reported,but further investigation should be *** the aid of numerical method,this paper focuses on the change of performance and flow field of ITD,as well as nearby turbines,brought by rising angle(RA).Eight ITDs with the same area ratio and length,but different RAs ranges from 8 degrees to 45 degrees,are *** to the investigation,flow field,especially outlet Ma of swirl blade is influenced by RA under potential effect,which is advisable for designers to modify HPT rotor blades after changing *** addition to that,low velocity area moves towards upstream until the first bend as RA increases,while pressure loss distribution at S2 stream surface shows that hub boundary layer is more sensitive to RA,and casing layer keeps almost *** the other hand,the overall total pressure loss could keep nearly equivalent among different RA cases,which implies the importance of optimization.

摘要：通过将采热管群与充填采矿技术相结合可提取矿井中的地热能,有效缓解高地热带来的热害问题。本文以采热管群为研究对象,分析了充填体放热过程中传热流体的温度、速度和压力分布,讨论了雷诺数、管径、管间距和管排方式对采热管群性能的影响。结果表明:当雷诺数从100增加到5000时,换热量从2.24×10^(3)kJ增加到16.78×10^(3)kJ,综合评价因子从0.087增加到1.31。当管径从4 mm增加到6 mm时,换热量从15.07×10^(3)kJ增加到17.11×10^(3)kJ,综合评价因子从1.157增加到1.388。当管间距从130 mm增加到170 mm时,换热量从14.24×10^(3)kJ增加到16.25×10^(3)kJ,综合评价因子从1.013增加到1.263。此外,四路并联布置可以保证较高的换热量和较低的压降,从而获得较高的综合评价因子。该研究为充填体中采热管群的设计和优化提供了理论参考。

摘要：北京某污泥堆肥厂污泥处理车间产生和收集的臭气经生物除臭处理后无法达到《城镇污水处理厂大气污染物排放标准》(DB 11/2007-2022),亟需进行改造。针对污泥处理产生臭气中氨气浓度高以及含有一定粉尘的特点,采用“水洗+酸洗+生物除臭+吸附”的组合除臭处理工艺,实现了尾气达标排放,提升了车间及厂区周边的空气环境质量。

摘要：The ultra-high bypass ratio turbofan engine attracts more and more attention in modern commercial engine due to advantages of high efficiency and low Specific Fuel Consumption(SFC). One of the characteristics of ultra-high bypass ratio turbofan is the intermediate turbine duct which guides the flow leaving high pressure turbine(HPT) to low pressure turbine(LPT) at a larger diameter, and this kind of design will lead to aggressive intermediate turbine duct(AITD) design concept. Thus, it is important to design the AITD without any severe loss. From the unsteady flow's point of view, in actual operating conditions, the incoming wake generated by HPT is unsteady which will take influence on boundary layer's transition within the ITD and LPT. In this paper, the three-dimensional unsteady aerodynamics of an AITD taken from a real engine is studied. The results of fully unsteady three-dimensional numerical simulations, performed with ANSYS-CFX(RANS simulation with transitional model), are critically evaluated against experimental data. After validation of the numerical model, the physical mechanisms inside the flow channel are analyzed, with an aim to quantify the sensitivities of different Reynolds number effect on both the ITD and LPT nozzle. Some general physical mechanisms can be recognized in the unsteady environment. It is recognized that wake characteristics plays a crucial role on the loss within both the ITD and LPT nozzle section, determining both time-averaged and time-resolved characteristics of the flow field. Meanwhile, particular attention needs to be paid to the unsteady effect on the boundary layer of LPT nozzle's suction side surface.

摘要：针对煤矿提升机液压制动装置存在的结构复杂、密封性差、散热不良等问题,从制动器结构、液压缸与活塞组件、控制阀块与管路布置、密封与散热系统等方面进行优化设计,并采用试验测试对设计方案进行验证。结果表明,新型液压制动装置具有制动力矩连续可调、响应迅速、同步性高、环境适应性强、使用寿命长等优点,显著提升了制动性能和可靠性,为煤矿提升机液压制动系统的设计提供了新思路,对于提高煤矿安全生产水平具有重要意义。