未来交通运输工具——真空管道运输系统的构想与展望

论述了真空管道运输系统的含义及产生背景,从研究现状、实现周期等几个方面进行了可行性分析,在具体设置真空管道运输系统时,对过渡舱、管道形式的设置、冷却装置及车厢漏气等问题提出了一些见解。由此可以相信,20～30年后,真空管道运输系统可以实现运营,在更远的将来,真空管道运输系统可以造福越来越多的人。     

高速列车的动态环境及其技术的根本特点

讨论了高速列车所处的动态环境。指出高速列车与普通列车的根本不同在于列车所处的动态环境发生了质的变化,由机械、电气作用为主,变为以气动作用为主。正是由于这一巨大变化,才产生了一系列高速列车技术的特点。例如,由于需要特大牵引功率来克服地表稠密大气所产生的阻力,高速列车必须放弃机车牵引,采用动车组模式;对高速列车必须进行“噪声设计”,才能分别按环保要求决定高速通道不同区段的最高限制速度。本文根据上述观点得出一些不同于通常所理解的关于地面高速交通的结论。比如:指出磁浮列车只有在低速下运行,才能凸显其低噪声的优点,高速度并不是它的特长。本文还进一步指出,地面开敞式高速交通,最高速度不宜高于400 km/h,超过这一限速必须采用真空管道高速交通。     

Aerodynamic simulation of evacuated tube maglev trains with different streamlined designs

Based on the Navier-Stokes (N-S) equations of incompressible viscous fluids and the standard k-ε turbulence model with assumptions of steady state and two dimensional conditions,a simulation of the aer...     

A mechanical and experimental study on the heat loss of solar evacuated tube

The experimental system of heat loss of all-glass evacuated solar collector tubes (evacuated tube) is firstly designed and constructed, which uses electric heater as thermal resource. The equilibrium temperatures are less than ±1℃ during the test, and the temperature differences of up/middle/low node in the tube are less than 1 ℃, 3 ℃, and 7℃ respectively. The heat loss of evacuated tube increases about 2.7% with vacuum state of 0.01-1 mPa, and it has the best performance at tube temperature of 20-280℃. The invalidation tube (> 200 mPa) has the biggest heat loss that increases linearly with the tube temperature. The evacuated tubes with the vacuum of 0.01-1 mPa are suitable for most solar adsorption refrigeration.     

Evacuated tube transport technologies （ET3）^tm： a maximum value global transportation network for passengers and cargo

Evacuated Tube Transport Technologies(ET3) offers the potential for more than an order of magnitude improvement in transportation efficiency,speed,cost,and effectiveness.An ET3 network may be optimized to sustainably displace most global transportation by car,ship,truck,train,and jet aircraft.To do this,ET3 standards should adhere to certain key principals:maximum value through efficiency,reliability,and simplicity;equal consideration for passenger and cargo loads;optimum size;high speed/high frequency oper...     

关于我国发展真空管道高速交通的思考

论述了我国发展真空管道高速交通的必要性和可行性．就管道压强、遮挡系数及其关键技术等基本问题展开讨论．重点论述我国发展真空管道高速交通的战略方针和技术方案．提出采用高温超导磁浮导向，同步线性电机牵引和低压强管道所组成的系统．建议立即开始研究试验，以期能于2030年前实现600—1000km／h超高速真空管道磁浮列车的商业运行．     

真空磁浮钢结构管道梁方案研究

真空管道磁浮交通技术由于突破了空气阻力、噪声和轮轨黏着等因素制约,未来可成为弥补或取代航空的长距离运输模式.为了获得适用于长距离运输和车辆条件的真空管道梁结构形式,在调研国内外研究现状的基础上,分析磁浮系统设计的顶层指标,从技术成熟度和可行性层面提出高架桥钢结构管道梁方案.以常用跨度25 m管道梁为例,采用多参数影响分...