失速

给出了建立在全三维N－S方程求解基础上的叶轮机械失速颤振分析的数值方法。

The presented numerical analysis of stall flutter in turbomachinery is based on the 3-D N-S equations solution .

用来描述我们经济形势的新说法是“失速速度”（stallspeed）。

The new phrase being used to describe our economic condition is ' stall speed . '

他因驾驶的单翼飞机失速坠地而丧生。

He was killed when his monoplane stalled and dived into the ground .

基于B参数的轴流压气机过失速稳定性分析

Stability Analysis of Axial-Flow Compressor Post-Stall Transients Based on Parameter B

本论文研究的是MW级主动失速型风机的功率控制策略。

The article studies the control strategy of active stall MW wind turbine .

用船舶失速数值方法替代经验公式，并用C语言编程提供了最短时间航线模拟算例。

It uses the numerical method of ship speed loss in stead of the experiential methods to improve the accuracy of the optimun route design .

应用DES（detachededdysimulation）方法数值模拟了3种不同失速类型的翼型的升力特性。

Detached - Eddy Simulation ( DES ) is applied to three airfoils with different stall types .

许多细菌，包括大肠杆菌，沙门氏菌等，能对DNA损伤或失速的DNA复制产生反应即SOS反应。

Many bacteria , including E. coli , Salmonella , DNA damage or stalled DNA replication reacted SOS response .

DH型离心空压机旋转失速故障诊断及治理

Fault Diagnosis and Treatment of Rotating Stall for DH Type Centrifugal Compressor

基于AVR单片机的断链失速智能保护研究

The study of smart protection for broken chain and stall based on AVR single-chip microcomputer

CalleyDavid：风力透平机的失速控制器和触发条件控制特徵。

Stall controller and triggering condition control features for a wind turbine .

用不可压缩流动的求解算法，结合WilcoxDC提出的kω模式和kωSST湍流模式，对翼型的动态失速进行了数值模拟。

Dynamic stall of the airfoil is numerically simulated with incompressible flow solver accompanied with the k ω turbulence model proposed by Wilcox D C and the k ω SST turbulence model .

通过CFD模拟发现，具有后加载造型、相对厚度大于40%的翼型压力面出现明显分离，造成翼型小攻角失速、升力系数下降。

Turbulent separation occurs on pressure surface at small attack angles for the airfoils which relative thickness more than 40 % , making airfoil stall at small attack angles and the lift coefficient decrease .

J-7（Ⅱ）型飞机失速/过失速/尾旋特性预测计算

The predicting calculation for aircraft j-7 (ⅱ) 's stall / post-stall / spin characteristics

通过对压气机旋转失速形成、发展、退出过程中压力信号频谱演化特性的分析，提出了一种基于FFT的压气机旋转失速信号检测判据。

Based on the analysis of spectrum evolving characteristics of pressure signal measured from a compressor before , during , and after rotating stall , a criterion based on FFT is put forward to detect rotating stall signal .

JJ-5飞机失速/尾旋特性数值计算和图像显示研究

The study of JJ-5 stall and spin characteristics digital simulation and image display

通过Morlet连续小波变换，详细分析压气机失稳过程中非定常信号的变化，并研究旋转失速初始扰动信号在处理机匣气室中的局部行为。

With the Morlet wavelet transform , the time-evolution of the unsteady signals during the stall inception and the local behavior in the casing treatment plenum are investigated .

低速压气机中静叶Clocking效应的二维和三维数值模拟与实验结果验证不同进口畸变下低速压气机近失速状态非定常特征

Experimental and Numerical Study on the clocking effect of static blade in a low-speed compressor unsteady flow behavior of near-stall states in low-speed compressor under different distortions

论文阐述了波浪增阻的本质，介绍了ITTC推荐的求失速的实验法和理论法。

The paper has expounded the nature of added resistance , and introduced the ITTC recommended speed-loss-solving methods ( experimentally and theoretically ) .

研究某型发动机的八级轴流压气机级间压力信号的最大Lyapunov指数，推断出失速和喘振的起始点具有相同的动力学特性：都为某一极限环边界上的点。

The largest Lyapunov exponents of the pressure signal of a certain engine with eight axial compressor stages are investigated : The stall and surge inception points possessing the same dynamic characteristics are all located on the boundary of a limit circle .

1992年3月22日，全美航空公司（USAir）405次班机在严寒天气下从拉瓜迪亚机场（LaGuardiaAirport）起飞。几分钟后飞机失速并紧急着陆，导致27名乘客死亡。

On March 22 1992 , USAir flight 405 departed from LaGuardia Airport in icy conditions and a few minutes later stalled and crash-landed , killing 27 passengers .

综观现有轮式机械行走闭式液压系统，其中典型控制方式是液压泵采用DA控制，液压马达采用HA控制，该典型控制方式的闭式液压系统在某种工况条件下会出现发动机失速现象。

Throughout the existing walking system of wheeled machinery , the hydraulic pump adopts DA control and hydraulic motor uses HA control , which is the typical control mode . In some conditions , closed hydraulic system with this typical control method will appear engine stall phenomenon .

动态失速模型以直升机理论的Beddoes-Leishman模型为基础。

The dynamic stall model is based on the Beddoes-Leishman model which evolves from the helicopter theory .

实际运行中，GGH堵塞引起压差增大，严重时导致增压风机失速、锅炉跳闸，影响机组运行的安全性、经济性和环保效益。

In practical operation , GGH plug causes pressure increasing , leading to serious boosting fan stall , boiler trip ; and affecting the safety of plant operation , economy and environmental benefits .

为了探索适用于长航时飞行器的翼型设计思想、方法和技术，进行了新型高升力及失速特性缓和的BUAAK1BUAAK2翼型的设计研究。

Design research of high lift , mild stall airfoils ( BUAA K1 / BUAA K2 ) was conducted in order to investigate their design strategy , methods and technology for a long endurance aircraft .

另外，采用了LeishmanBeddoes非定常和动态失速模型，入流由自由尾迹分析获得。

In addition , the Leishman and Beddoes unsteady and dynamic stall model is incorporated and the inflow is evaluated with the free wake analysis .

以Leishman-Beddoes模型为基础，对动态翼型气动特性分为非定常附着流、非定常分离流和动态失速三个部分进行模拟。

Using the Leishman-Beddoes model , this paper represents three parts of flow behaviour for dynamic airfoil including attached flow , separated flow and dynamic stall .

利用建立的非线性飞机模型和大迎角控制律，对两种典型的过失速机动&眼镜蛇机动和Herbst机动进行了仿真研究，进一步揭示了飞机过失速机动的飞行力学机理。

Basing on the fighter nonlinear model and the high-attack-angle control law , the dynamic characteristics of post-stall maneuver are studied , with the successful simulations of two typical post-stall maneuver - " Cobra " and " Herbst " maneuver .

通过12组方案的实验，当尾流撞击频率为2000Hz和4000Hz时，对压气机失速裕度的改善最为明显，相对增量分别达到19.5%和15.2%；

Through 12 wake effect disturbance coupling experiments , the stall margin was improved significantly at the wake effect frequencies of 2 000 Hz and 4 000 Hz , and the relative increase of surge margin reached 19.5 % and 15.2 % respectively .

分析了旋转失速起始条件的机理。

Mechanism for the onset condition of rotating stall is analysed .