L/D：长径比
“长径比”是工程与科研领域的一个重要参数，常用英文术语“Length-to-Diameter ratio”表示。为便于书写和沟通，该术语常缩写为L/D。这一概念广泛应用于机械设计、材料科学和航空航天等行业，在美国国家航空航天局（NASA）的相关技术文档与标准中也十分常见。
Length-to-Diameter ratio具体释义
Length-to-Diameter ratio的英文发音
例句
- And a series of numerical studies is performed to obtain the effects of area ratio and length-to-diameter ratio of mixing duct on pumping coefficient and thermal mixing efficiency of a lobed mixer-ejector.
- 针对混合管的结构参数开展了系列研究，获得了混合管截面比和长径比(L/D)对于引射系数和热混合效率的影响趋势。
- The numerical results reveal the changing rule of the amplitude with the eccentricity of rotor, the clearance-to-radius ratio, the length-to-diameter ratio and oil viscosity of bearing.
- 计算得到了转子的振动随转子的偏心距、轴承的长径比(L/D)、间隙比、润滑油粘度的变化规律，分析结果为定量和定性分析该类机组转子-轴承系统的稳定性提供了参考依据。
- A series of regular curves of stability versus preload factor of the bearing are ( obtained ) in the case of different eccentricity ratio and length-to-diameter ratio, and these curves are analyzed theoretically.
- 得出了三油楔径向滑动轴承稳定性在不同偏心率和宽径比下随轴承预负荷系数的变化而变化的一系列规律性曲线，并进行了理论分析。
- Simplified analysis on a single fiber fin in the duct flow demonstrates that the heat transfer can be enhanced with the increasing length-to-diameter ratio and thermal conductivity ratio.
- 对单根纤毛肋进行的简化理论分析表明纤毛长径比(L/D)和肋材与流体的导热系数比越大其强化换热作用越好。
- It shows that with the increasing of curvature radius, liner thickness, the length-to-diameter ratio of the charge, and decreasing of shell thickness, the velocity of EFP increase.
- 结果表明：随着药型罩曲率半径、装药长径比(L/D)、壳体厚度的增大以及药型罩壁厚减少，EFP的速度增大。
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