查询词典 Venturi tube

Based on the analysis of the dynamic differential pressure signal of two-phase flow through Venturi tube, the various flowrate equations were established according to the flow pattern.

论文通过对文丘里管前后两端的动态差压信号的分析和处理，根据用波动系数确定的流型，建立了不同流型下的各种流量测量公式。

In this paper experimental and theory research was conducted on flow rate measurement for steam-water two-phase flow using venturi tube method and the flow rate measurement was fulfilled.

本文对采用文丘利管测量汽液两相流体流量的方法进行了实验和理论研究，实现了对汽液两相流体流量的测量。

Oil-water two-phase flow ; Venturi tube ; Hilbert-Huang transform ; support vector machine

油水两相流；文丘里管； Hilbert-Huang变换；支持向量机

Gas phase flow rate of two-phase flow was studied based on homogeneous flow model with slip model used void fraction sensor and venturi tube in this paper.

本文利用文丘里管和含气率传感器对空气水两相流气相流量计算方法进行了研究，在均相流模型基础上考虑了滑速比因素造成的影响，探讨了两相流气相流量计算方法。

It is shown though the result that the problem of reverse pressure difference is solved by adopting the Venturi tube with appropriate proportion between intake and throat. Adopting appropriate EGR ratio at different conditions can not only guarantee diesel engine's performance but also decrease the amount of NO.

研究表明，采用带有合适的进、喉口比例尺寸的文丘里管解决了进排压逆差问题，不同工况下采用合适的EGR率保障了柴油机的工作性能，并有效降低了NO的排放。

To overcome the difficulties in measuring the oil-water two-phase flow,the oil-water two-phase flow regime was studied with a horizontal Venturi tube and a model of flow measurement was established.

针对油水两相流的测量难题，利用文丘里管对水平管内油水两相流流型进行了研究。基于差压波动信号，提出了Hilbert-Huang变换与支持向量机相结合的流型识别方法。

The subject of the mechanism-based emulsion formulated based on the theory, the ratio in the emulsion is to use part of the Venturi tube by high-speed water pipes in their place to produce negative pressure to suction up oil ratio of the working principle, and the higher degree of automation systems, the emulsion with the concentration can completely meet the "Coal Mine Safety Regulations" requirements.

本课题在基于乳化液配制机理的理论基础之上，在乳化液配比部分是利用通过文丘里管的高速水流在其喉管处产生负压将油吸上来的工作原理进行配比的，该系统自动化程度较高，所配乳化液浓度完全能够满足《煤矿安全规程》要求。

To overcome the difficulties in measuring the oil-water two-phase flow ,the oil-water two-phase flow regime was studied with a horizontal Venturi tube and a model of flow measurement was established.

针对油水两相流的测量难题，利用文丘里管对水平管内油水两相流流型进行了研究。

At first, the dynamic differential pressure signals coming from Venturi tube were processed by normalization and EMD. The Intrinsic Mode Functions which contained high frequency component were denoised by wavelet packet.

该方法首先提取气液两相流动态差压信号，通过EMD技术对其进行分解，对分解出来的高频模态进行小波包消噪，然后通过ICA技术实现原始信号的降维处理。

Flow regime and void fraction are important parameter in gas-liquid two-phase flow, the relation of differential pressure signal coming from Venturi tube and the flow regime of gas-liquid two-phase flow was studied in this paper, A kind of flow regime identification method of gas-liquid two-phase flow based on Hilbert-Huang Transform and fuzzy inference was put forward, the familiar flow regime identification of gas-oil and gas-water two-phase flow was achieved.

两相流动是一个十分复杂的过程，参数较多，检测相当困难。流型、空隙率是气液两相流中非常重要的参数，而且测量比较困难，还影响两相流其它参数的测量。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。