为什么设计和非设计工况有不同的程序？
本文针对非设计工况下叶栅的分离流动进行研究。
This paper focuses on the unsteady characteristic of cascade separation flow under off-design condition.
并求解同一工况下循环系统各状态点在设计工况下的状态参数。
Under the same condition, the parameters of different state are also computed.
采用ASPEN系统模拟软件对某空分流程的设计工况和实际工况进行了模拟计算。
Design and real process of air separation flowsheet were simulated on the basis of ASPEN software system.
此外，还指出在设计流量下优化的叶轮不一定在非设计工况下也有良好的声学性能。
In addition, it is shown that impellers optimized at design point may not have good acoustic performances at off design point.
在模拟结果与设计工况的数据吻合度较高的基础上，对现有的精馏系统进行模拟分析。
Based on the high matching of the simulation result and design condition data, simulate and analyze the existing distillation system.
在非设计工况下运行时，火焰的轴向位置和燃烧放热的变化也对系统稳定性产生影响。
Under off-design operating conditions, shifting of the flame's axial position and its heat release may also influence the system's stability.
焓差试验结果表明设计工况下样机实际制冷功率约为700w，循环COP约为0.31。
The test used "Enthalpy Difference Method Setup" shows that the prototype can obtain a cooling power of about 700w and COP 0.31.
计算表明，在正常设计工况下，加桩后前墙弯矩减少了约70%，负弯矩减少了约10%。
The results show that under normal conditions of the design, after adding piles, the moments of the front wall are reduced by about 70%, and the negative moments about 10%.
以离心压缩机扩压器叶栅为例，在两个给定设计工况下采用所提出的方法求解其最佳叶片型线。
A diffuser cascade of a centrifugal compressor was chosen to be designed with the proposed approach, with its two operating points specified, and its blade profile to be optimized.
设备设计工况与额定工况不同时，必须对设备的实际制冷能力进行校核，以保证实现设计目的。
When design condition is different from the rated condition, it is necessary to check the capacity of the terminal unit under the design condition to ensure it is matched with the request.
对单级切线泵在设计工况进行了定常流动数值模拟，分析了叶轮流道及蜗壳内的液体流动情况。
The numerical analysis of a whole flow field for a single stage tangent pump was presented.
采用离散涡方法数值仿真了不同来流攻角下，固定与动边界叶栅绕流。在设计工况时流动接近定常流动。
The unsteady flow past stationary and oscillating cascade for off-design performance respectively are simulated numerically with the Discrete Vortex Method.
给出了一双级高负荷跨音速风扇设计和非设计工况下的详细计算结果，各工况下的计算与实验数据均吻合较好。
The computed results for a highly loaded two-stage fan at design and off-design conditions were given in detail. The simulation results show good agreement with experiment data.
分析结果表明，热气导管的设计工况完全处于稳定区内，即其在设计工况下运行时，不会产生大振幅的流致振动。
The analysis results are that the design condition of hot gas conduit falls in the stability area, in other word, running at design condition, the flow induced large amplitude vibration doesn't exist.
然后本着优化设计的原则对地源热泵系统的设计工况进行了分析，根据其工作特点对机组各主要部件进行了设计。
Then on the principle of optimizing design the working condition of ground source heat pump system is analyzed. According to the performance of the unit each main component is designed.
结合实际算例，分析了换热器总传热面积对系统特性的影响以及不同设计工况下的优化结果，同时讨论了换热器种类对最小总传热面积的影响。
With an example, analyses the effect of total heat exchanger area on system performance and the optimizing results under different conditions and discusses the impact …
非设计工况下流道的水力损失恒大于相同流量时设计工况下的水力损失，左侧的水力损失大于右侧的水力损失，且不符合二次抛物线变化规律。
The head loss of the left side is always greater than that of the right side, and the head loss curves don't comply with the second order parabolic law.
混流式水轮机在非设计工况点下运行时，尾水管内部的非定常流动是由死水域和螺旋涡带的动态行为引起的，尾水管上部的螺旋涡带旋转引起流动的基频脉动。
The unsteady flow in a draft tube of Francis turbine under the off-design operation is produced by the dynamic behavior of a helical vortex rope with the dead core.
由于采用了非线性混合边界元，故本文所提出的方法精度高，简单易行，计算量小，可以较广泛地适用于偏离设计工况的运行情况，算例结果同实验值吻合很好。
A nonlinear mixed boundary element method is used here. And this method can be easily extended to off design conditions. The calculated results agreed very well with experimental data.
由于采用了非线性混合边界元，故本文所提出的方法精度高，简单易行，计算量小，可以较广泛地适用于偏离设计工况的运行情况，算例结果同实验值吻合很好。
A nonlinear mixed boundary element method is used here. And this method can be easily extended to off design conditions. The calculated results agreed very well with experimental data.
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