1) hot-wire anemometer
热线风速仪
1.
The flow field of two opposed jets was experimentally investigated with the smoke-wire technique and hot-wire anemometer for the stability of impingement plane and stagnation point offset at various nozzle separations and exit velocity ratios.
运用烟线法和热线风速仪对两喷嘴撞击流流场进行了实验研究,考察了不同喷嘴间距、不同气速比下撞击面的稳定性和撞击面驻点的偏移规律。
2.
Result calculated by Realizable kε model is reasonably in agreement with data measured by hot-wire anemometer,which showed that Realizable k-ε model is suitable for three-dimensional numerical simulation of gas flow field on the tray.
2软件和湍流模型对气流通过折边固定阀塔板气相流场进行了数值模拟,并将模拟结果与通过热线风速仪的测定结果进行对比。
3.
An experimental study was conducted of the cold-state flow field of a dual swirl gas burner model through the use of an IFA300 type two-dimensional constant-temperature hot-wire anemometer system.
利用IFA300型二维恒温热线风速仪系统对双旋流气体燃烧器模型的冷态流场进行了实验研究,测量了流场内不同位置瞬时速度分布及湍流强度特性。
2) hot wire anemometer
热线风速仪
1.
The air flow at the air inlet of the outdoor unit of an air conditioner with air-source heat pump is mea-(sured) using a hot wire anemometer.
采用热线风速仪对热泵型空调室外机组空气入口侧的空气流场进行了测量,结果表明:室外机的风速分布是不均匀的,风速的最大值和最小值相差约4倍。
2.
Detailed instantaneous flow has been measured at several positions using a hot wire anemometer with Phase-Locked Ensemble Averaged technique.
实验采用了固定热线、相位锁定——系综平均技术，用常温热线风速仪对叶轮后的叶片扩压器通道内不同周向、径向和轴向位置处的非定常速度进行了测量，同时提出了非定常强度的概念，以定量考核非定常的影响。
3.
In this article, the hot wire anemometer(HWA) has been used in study the rigidity regulation characteristics and turbulence specialty of the horizontal bias combustion pulverized coal burner with side secondary air(HBC SSA burners) jet in a tangentially fired flow field in furnace.
采用热线风速仪 ,在四角切圆燃烧的流场中 ,改变水平浓淡风煤粉燃烧器的侧二次风与一次风动量比 ,对射流的刚性及湍流特性调节进行了详细的试验研究 ,并分析了其稳燃及防水冷壁高温腐蚀机理 ,得到了最佳的侧二次风与一次风的动量比范围。
3) HWA
热线风速仪
1.
With the 45° inclined HWA, we measured the steady and unsteady effect in both sides of each rotor of a two-stage counter-rotating axial fan in both near peak efficiency and near stall conditions.
采用45°斜丝热线风速仪(HWA),在近最高效率和近失速工况下测量了一台两级对旋轴流风机的定常与非定常流场。
2.
The flow parameters of stator wake were measured by hot wire anemometers(HWA) under different mass injection.
使用热线风速仪对静子尾迹区在不同吹气量下的轴向速度进行了测量,得到了在纯尾迹、弱尾迹、无动量亏损尾迹和射流这4种工况下尾迹区的轴向速度分布、中心点速度频谱图以及尾迹特征长度沿流动方向的变化。
4) hot wire anemometry
热线风速仪
1.
The characteristics of asymmetric impinging streams were measured with hot wire anemometry and simulated with CFD.
采用恒温式热线风速仪(CTA)测量不对称撞击流流场。
2.
The velocity and temperature in the air inlet/outlet shutters of engine compartment are tested by using hot wire anemometry.
以某履带车辆动力舱为研究对象,建立了舱内空气流动与传热计算的物理模型和数学模型,采用标准kε-方程湍流模型对动力舱内的空气流动进行了描述,采用Fluent软件中的薄面模型对散热器与冷却风扇进行了简化处理,对舱内空气的速度场和温度场进行了三维数值模拟,采用热线风速仪对进、排气窗处的气体流速与温度进行了试验测试,测试值与模拟值的最大相对误差为9。
5) hot wire/film anemometer
热线风速仪
1.
Adopting the IFA 300 hot wire/film anemometer,the detailed measurement results about the effect of out flow Reynolds number on the semi confined turbulent impinging jet flow field are provided.
通过采用热线风速仪给出了在半封闭、入射高度为 2倍喷管直径时三种不同的雷诺数下紊流冲击射流流场的详细的测量结果 ,并与文献结果作了比较。
2.
By using the IFA 300 Hot Wire/Film Anemometer, a detailed measurement for the effect of nozzle to plate space on the semi confined turbulent impinging jet flow field is obtained.
采用热线风速仪给出了在半封闭、雷诺数为 2 30 0 0时四种不同的冲击高度下紊流冲击射流流场的详细的测量结果 ,并与文献结果作了比较 。
6) hot-wire anemometry
热线风速仪
1.
The axial velocity and stagnation point offset of two opposed jets coming from two asymmetric nozzles oppositely located with large separation distance were studied by using hot-wire anemometry (HWA).
采用热线风速仪对大喷嘴间距下两不对称喷嘴形成的对置撞击流的轴线速度分布和驻点偏移规律进行了实验研究。
补充资料：热线风速仪
| 热线风速仪 hot-wire anemometer 将流速信号转变为电信号的一种测速仪器，也可测量流体温度或密度。其原理是，将一根通电加热的细金属丝（称热线）置于气流中，热线在气流中的散热量与流速有关，而散热量导致热线温度变化而引起电阻变化，流速信号即转变成电信号。它有两种工作模式： ①恒流式。通过热线的电流保持不变，温度变化时，热线电阻改变，因而两端电压变化，由此测量流速；②恒温式。热线的温度保持不变，如保持150℃，根据所需施加的电流可度量流速。恒温式比恒流式应用更广泛。热线长度一般在0.5～2毫米范围，直径在1～10微米范围，材料为铂、钨或铂铑合金等。若以一片很薄(厚度小于0.1微米)的金属膜代替金属丝，即为热膜风速仪，功能与热丝相似，但多用于测量液体流速。热线除普通的单线式外，还可以是组合的双线式或三线式，用以测量各个方向的速度分量。从热线输出的电信号，经放大、补偿和数字化后输入计算机，可提高测量精度，自动完成数据后处理过程，扩大测速功能，如同时完成瞬时值和时均值、合速度和分速度、湍流度和其他湍流参数的测量。热线风速仪与皮托管相比，具有探头体积小，对流场干扰小；响应快，能测量非定常流速；能测量很低速（如低达0.3米／秒)等优点。 |
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参考词条