pressure drag

Experimental research on pressure drag of the double container car passing through tunnel;

双层集装箱列车过隧道空气压差阻力实验研究

a passive base-bleed method for reducing drag of bluff-body vehicles is proposed,in which a proper through hole is made in the lower part of the vehicles to have the "higher pressure" air in front of the vehicle flow to its"lower pressure" base region passing though the hole,thus reduce the pressure drag on the vehicle and the fuel consumption.

为了减小车辆阻力,提高燃油利用率,提出了一种钝尾车辆的被动通风减阻方法,即在钝尾车辆的下部适当部位开一个适当尺寸的通孔,以便为均衡车体前后的压力提供一个通道,当车辆行驶时,使得车体前部的"高压"气体能够通过这个孔流到相对"低压"的车体底部区域,从而减少车辆的压差阻力以降低燃油消耗。

The theoretical analysis and experimental results show that boundary layer separation will produce pressure drag.

理论分析和实验的结果说明:边界层分离将引起压差阻力。

Study on Mechanism and Resistance in the Process of Driving Pretest Piles;

预压托换桩的压桩机理与压桩阻力研究

Study on estimating method of static jacked resistance of precast piles;

粉砂土地区静压预制桩压桩阻力的预估和研究

Comparison of several calculation methods of static pressure pile sinking resistance pressure

几种计算静压桩沉桩阻力方法的比较

Study of Sinking-resistance and Compaction Effect of Static-press Pile;

静压桩施工沉桩阻力及沉桩挤土效应研究

Research of Pile-sinking Resistance of Jacked Pile in Soft Clay and Discussion on It s Application;

软土地区静压桩沉桩阻力的研究及应用探讨

STUDY ON NEGATIVE FRICTION MECHANISM OF SUPER-LONG POST-GROUTING PILE TEST

后压浆超长桩试验桩侧负摩阻力机理分析

Soil pressure explain for load direction effects on pile's friction bearing properties

不同荷载方向下土压力对桩土摩阻力的影响

Theoretical Estimation and Numerical Analysis on the Penetrating Resistance of Jacked-in PHC Pipe Pile in the Songhua River Floodplain Areas

松花江漫滩地区静压PHC管桩沉桩阻力理论估算与数值分析

Computational simulation of jacking force based on spherical cavity expansion theory and friction fatigue effect

基于球孔扩张理论和侧阻力退化效应的压桩力计算模拟

INFLUENCE OF PILE BOTTOM SLIME ON SKIN FRICTION AND BEARING CAPACITY ESTIMATION TO PILE

桩底沉渣对桩侧摩阻力影响及桩承载力的估算

The discussion on shaft resistance and tip resistance of pile assayed through static load test

论通过静载荷试验测定桩侧摩阻力及桩端阻力

FRICTION FATIGUE UNDER INSTALLATION AND TIME-RELATED INCREASE IN SHAFT CAPACITIES OF JACKED PILE

静压桩沉桩过程中的侧阻退化及成桩后侧阻时效研究

Research on Relationship between Shaft Resistance of Rock-Socketed Pile and Behavior of Around Rock;

嵌岩桩桩侧阻力与岩土参数关系研究

Theoretical Research of the Pile s Negative Friction along Pile s Depth;

桩基负摩阻力沿桩身变化的理论研究

Rock strength characteristics and research on rock-socketed pile-tip ultimate resistance

岩石强度特性与嵌岩桩桩端极限阻力

Research on Side Resistance of Cast-in-place Piles in Field Test

地表试验条件下灌注桩桩侧阻力分析

FORCE ANALYSIS OF VALVE CLACK IMMERSED TUBE FOR PILE WITH PLATES

压扩支盘桩的桩尖阀瓣扩压受力分析

Finite Element Analysis of Pile Clamping Box of Hydraulic Static Pile Driver

液压静力压桩机夹桩箱的有限元分析