Nusselt number
英
美
努塞尔数
双语例句
- A correlation formula of relative difference of local Nusselt number and dimensionless local temperature difference was presented by fitting numerical data.
通过对计算数据进行拟合之后，得到了层流时自由盘盘面局部努塞尔数的相对偏差与盘面无量纲局部温差的计算关联式。 - There are no significant difference in averaged Nusselt number between the stepwise abrupt variation and linear variation in the rotating speed.
在给定时间内转速增至最大后使系统稳定还是分段使系统稳定后再增加转速，对盘面平均努赛尔特数的影响不是特别明显。 - Numerical simulation shows that: ( 1) the location of the maximum Nusselt number was offset from the stagnation point at a certain distance;
计算结果显示：冲击区努赛尔特数最大值不在驻点，而是偏离驻点一段距离； - Moreover, the harmonic curves for the transient local Nusselt number and the transient local skin-friction coefficient have the same wave number as that of the wavy surface.
而且暂态局部紐塞尔數与表面摩擦系數之谐波曲线与波形板表面具有相同之波數。 - The impingement and swirl play a primary role on the Nusselt number of the researched surfaces.
冲击和旋流是通道各个面换热强化的主要原因； - Effects of the power-law index and the amplitude-wavelength ratio on the Nusselt number and the skin-friction coefficient are examined.
探讨幂次律指數与振幅波长比对紐塞尔數与表面摩擦系數之影响。 - Heat transfer properties of supercritical carbon dioxide, as well as effects of initial pressure and heating strength on heat transfer film coefficient and Nusselt number, are investigated experimentally.
利用此试验装置系统，对超临界流体二氧化碳的传热特性进行了实验研究。研究了初始压力、热流密度等对传热膜系数和努塞尔特数的影响。 - Discussing the corresponding relations and the difference between outside heat transfer coefficient and Nusselt number under these two kinds of boundary condition, it has vital significance for the heat exchange equipment design.
探讨这两种边界条件下对流换热系数与努谢尔数的关系和差别，这对于换热设备的设计具有重要的意义。 - The smaller the aspect ratio is, the more the decrease of the average Nusselt number is.
高宽比越小，平均Nu数下降越大。 - The Nusselt number ratio decreases with increasing Kn and decreasing thermal accommodation coefficient when one wall heated alone.
单环加热时，换热系数随内外径比的变化随Kn数的增加而下移； - With respect to impinging cooling, the distribution of average and stagnant Nusselt number impinging on plane, Convex and concave surface is investigated.
对于冲击冷却，总结了冲击各种表面情况下，滞止和平均Nu数分布规律和冷却效率对冲击距离设计的影响。 - The low temperature zone in the flow field as well as the locations of the maximum pressure coefficient and the maximum local Nusselt number on the impingement surface all move to the left side of the flow field as the angle decreases.
流场中的低温区以及冲击表面压力系数最大值和局部Nu最大值的位置也都随着倾角的减小而向流场的左侧偏移。 - The experimental correlations of friction constant and Nusselt number were gained based on the experimental results.
基于实验结果，得出了摩擦常数及努塞尔数的实验关联式。 - The fully developed Nusselt number found by numerical solution for the developing region was compared with that of asymptotic analysis and a good degree of agreement is observed.
在发展区域，利用数值解得到的充分发展Nusselt数与渐近分析结果进行了比较，吻合很好。 - The results showed that the apparent convective heat transfer coefficient would become larger when the primary airflow increased, and the Nusselt number would get larger while the particle circulation rate increased or the average particle diameter decreased.
试验表明：随着一次风风速的增加，循环床中气体和颗粒之间的表现热换系数变大，当固体颗粒循环量增加或颗粒平均粒径减小时，表征相间换热特性的Nu数增大。 - Averaged Nusselt number enlarges with the increase of Rotational Reynolds number.
转速增加使盘面平均努赛尔特数增大； - Based on the computational results, the correlation between the Nusselt number, friction factor and Reynolds number are also given.
根据计算得出的数据，拟合出了本文所研究的通道的入口雷诺数Re与平均努塞尔数Nu和入口雷诺数Re与摩擦系数f之间的关系式。 - With the delta vortex generator height increased, its Nusselt number also increases.
°（3）几何尺寸是重要影响因素，随高度的增加，对应的Nu数也随之提高。 - It is found that the pressure coefficient and local Nusselt number along the heated surface begin to vary periodically after the second rib.
数值结果表明从第2个肋块开始加热段表面压力系数Cp和努塞尔数Nu开始呈周期性变化。 - For the thermally developing region, a numerical study was reported while a perturbation analysis was presented to find expressions for the temperature profile and the Nusselt number for the fully developed region.
在热发展区域，进行了数值研究；在充分发展区域，进行了摄动分析并求得温度分布的表达式和Nusselt数。 - Secondly, the relation between Nusselt number and the local time-averaged velocity and temperature fields of turbulent convection was theoretically induced, which expands the field-coordinated enhancement principle to turbulent convective heat transfer.
然后，在理论上导出了紊流对流换热的整体换热性能与局域时均速度场和时均温度场的一般关系式，将对流换热的场协同强化原则扩展至湍流换热。 - The heat transfer characteristics of the impinging jet are dominated by the flow field structure. The existence of the velocity off-center peaks results in the formation of the local Nusselt number off-center peaks on the impingement surface.
冲击射流的传热特性受流场结构的控制，偏心速度峰值的存在导致了冲击壁面上局部Nu数偏心峰值的形成。 - Entrance Friction Factor and Nusselt Number of a Micro-Duct
微通道入口处的摩擦因子与努塞尔数 - The Nusselt number computed increases with distance between tubes in the flow direction.
平均Nusselt数的计算值随流动方向管间距的增加而增加。 - The correlation equation between the Nusselt number of heat transfer and the field parameters is derived when gas flow through tube bundles in transverse direction, and the Field Coordination Principle is analyzed and validated by numerical simulation.
对气流横向冲刷管束换热这种比较复杂的流动形式，推导出了气流横向冲刷管束换热时的传热努塞尔数与场参数的关系表达式，用数值模拟的方法对场协同原理进行了分析与验证。 - When the elastic force increases, the distributions of axial velocity, temperature and axial normal stress as well as secondary flow structure will change. The elasticity also influences the ratio of fiction factor and the Nusselt number.
弹性力的加强会使得轴向速度分布、温度分布和二次流结构向外壁侧移动，轴法向应力变大，也会对摩擦系数和Nusselt产生影响。 - The variations of secondary flow, axial velocity, distribution of temperature and axial normal stress, the ratio of fiction factor and the Nusselt number with different dimensionless parameters had been examined in detail.
详细讨论了各种无量纲参数对于轴向速度分布、二次流动、温度分布、轴法向应力，摩擦系数和Nusselt数的影响，获得了若干重要结果。 - For the flat wave-finned tube bank, the velocity and temperature fields of air were obtained by numerical simulation and the correlations of flow friction loss coefficient and Nusselt number were presented.
对于波形翅片扁平管束，通过数值模拟，获得了空气流场和温度场，拟合得到了空气流动损失和对流换热的数值实验关联式。 - For the elliptical-finned elliptical tube bank, the correlation of flow loss coefficient and Nusselt number were also obtained by the numerical simulation and the data analysis.
对于椭圆翅片椭圆管束，通过数值模拟和结果的计算分析，也获得了空气流动损失和对流换热的数值实验关联式。