基于ECD下的轿车塑料油箱生命周期实现及探讨

在阐述环境意识设计(ECD)的实现目标及方法的基础上，结合轿车塑料油箱产品的实例，进行了全生命周期的ECD实现，并作了初步的分析及探讨。     

基于labview的油罐液面高度监测系统

针对人工油罐液面高度测量不方便、不精确的问题利用NI公司开发的labvie平台设计了油罐液面监测系统,能够快速准确的测量油罐的液位和温度,达到了对油罐的实时监测.介绍了有关labview开发平台以及相关的数据采集实现方法.     

Particle‐resolved PIV experiments of solid‐liquid mixing in a turbulent stirred tank

Particle Image Velocimetry (PIV) experiments on turbulent solid‐liquid stirred tank flow with careful refractive index matching of the two phases have been performed. The spatial resolution of the PIV data is finer than the size of the spherical, uniformly sized solid particles, thereby providing insight in the flow around individual particles. The impeller is a down‐pumping pitch‐blade turbine. The impeller‐based Reynolds number has been fixed to Re = 10⁴. Overall solids volume fractions up to 8% have been investigated. The PIV experiments are impeller‐angle resolved, that is, conditioned on the angular position of the impeller. The two‐phase systems are in partially suspended states with an inhomogeneous distribution of solids: high solids loadings near the bottom and near the outer walls of the tank, much less solids in the bulk of the tank. The liquid velocity fields show very strong phase coupling effects with the particles increasingly attenuating the overall circulation patterns as well as the liquid velocity fluctuation levels when the solids volume fraction is increased. © 2017 American Institute of Chemical Engineers AIChE J, 63: 389–402, 2018     

High-temperature solid lubricating substances

An evaluation of the results of studies of the friction of solids at elevated temperatures in a vacuum and in air has enabled the identification of promising materials for use as solid-lubricating substances within various temperature ranges. Solid-lubricating substances (solid greases) are commonly incorporated into composite materials and coatings. When several solid greases are introduced into a composition, their action results in synergism.     

Transitional flow in a Rushton turbine stirred tank

The way in which the single phase flow of Newtonian liquids in the vicinity of the impeller in a Rushton turbine stirred tank goes through a laminar‐turbulent transition has been studied in detail experimentally (with Particle Image Velocimetry) as well as computationally. For Reynolds numbers equal to or higher than 6000, the average velocities and velocity fluctuation levels scale well with the impeller tip speed, that is, show Reynolds independent behavior. Surprising flow structures were measured—and confirmed through independent experimental repetitions—at Reynolds numbers around 1300. Upon reducing the Reynolds number from values in the fully turbulent regime, the trailing vortex system behind the impeller blades weakens with the upper vortex weakening much stronger than the lower vortex. Simulations with a variety of methods (direct numerical simulations, transitional turbulence modeling) and software implementations (ANSYS‐Fluent commercial software, lattice‐Boltzmann in‐house software) have only partial success in representing the experimentally observed laminar‐turbulent transition. © 2017 American Institute of Chemical Engineers AIChE J, 63: 3610–3623, 2017     

火箭贮箱结构健康监测传感器系统设计

为了保证火箭贮箱结构在存储过程中的完整性,需要开发适用于低温环境的贮箱结构在役结构健康监测传感器系统。该文进行了一系列低温测试试验。首先,利用长期监测试验考察了长期处于低温环境下的压电晶片传感器和粘接剂的性能退化情况,以表征其低温耐久性;然后,利用低温/常温剪切强度试验测试了不同种类粘接剂在贮箱结构使用环境下的抗高应变性能;最后,通过不同温度(室温~-180℃)下的Lamb信号收发试验评估了不同传感器系统的低温工作性能。实验结果表明,选用的粘接剂在低温下的力学性能和耐久性较好,压电晶片传感器在低温下耐久性良好。该文设计的传感器系统可用于火箭贮箱结构低温监测。     

Ca(OH)_2-CaCl_2沉淀法处理核工业高氟废水

为强化石灰沉淀法处理高氟废水时混合液的沉降性能,采用烧杯试验,分别考察了药剂投量、混凝剂投量、药剂投加顺序、原水F-浓度等因素对泥水分离性能的影响。研究表明,联合投加Ca(OH)_2和CaCl_2处理F-在5 000~10 000 mg/L的废水时,自絮凝会显著改善混合液沉降性能和出水浊度,而投加混凝剂的效果却有限。先Ca(OH)_2后CaCl_2的投加方式(二步法)比药剂同时投加(一步法)对沉降性能有较大的改善。运用分步加药法在中试规模的同程水平流斜板沉淀池实现了良好的固液分离效果。     

3000m~3玻璃钢储罐有限元分析

使用有限元分析软件ANSYS对某油田开发工程中所使用的3 000 m~3玻璃钢储罐进行建模,建立了与储罐罐顶、罐壁、加强筋、抗风圈实际尺寸一致的计算模型,重点分析了储罐在设计内压、罐内液压、地震载荷、风载、雪载及集中载荷组合下的整体强度、刚度,并根据相应的标准对结构的安全性进行了评价,分析结果表明本玻璃钢储罐的设计是合理的,能够满足相应的力学和安全要求。     

斜管除油罐的结构设计与计算

针对委内瑞拉某油田项目中,稠油污水油含量大、乳化程度高等特点。选用调储-除油-气浮-过滤-注水的技术路线处理含油污水,其中采用立式斜管除油罐作为油水分离的主要处理设备。处理后污水中油的质量浓度不超过100 mg/L,达到溶气气浮进水水质要求。根据SY/T 0083—2008《除油罐设计规范》和GB 50284—2015《油田采出水处理设计规范》,简要总结了立式斜管除油罐的设计计算过程。     

无粘结预应力技术在沉淀池设计中的应用

根据沉淀池的基本情况，从预应力计算、预应力方案选择、预应力设计及构造措施、施工措施等方面，介绍了环向无粘结预应力结构设计方案，以满足沉淀池的设计要求。