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Yu P.,Tianjin University | Xu Y.,Tianjin University | Zhang T.,Tianjin University | Zhu Z.,Nanyang Technological University | And 4 more authors.
AIChE Journal | Year: 2015

A model for gas-liquid annular and stratified flow through a standard Venturi meter is investigated, using the two-phase hydrokinetics theory. The one-dimensional momentum equation for gas has been solved in the axial direction of Venturi meters, taking into consideration the factors including the void fraction, the friction between the two phases and the entrainment in the gas core. The distribution of wet gas static pressure between the two pressure tapings of the Venturi meters has been modeled in the pressure range of 0.1-0.6 MPa. Compared with the experimental data, all the relative deviations of the predicted points by the model were within ±15%. As the model is less dependent on the specific empirical apparatus and data, it provides the basis for further establishing a flow measurement model of wet gas which will produce fewer biases in results when it is extrapolated. © 2014 American Institute of Chemical Engineers. Source


Qin Z.-G.,State Key Laboratory of Geohazard Prevention and Geoenvironment Protection | Qin Z.-G.,Key Laboratory of Earth Exploration and Information Technology of Ministry of Education | Qin Z.-G.,CCDE Geophysical Prospecting Company | Li H.-L.,State Key Laboratory of Geohazard Prevention and Geoenvironment Protection | And 5 more authors.
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2013

Most signal acquisition systems require the parameters of its signal conditioning part is adjustable, as well as select diversity with conditioning mode. This paper designed programmed and independent programmable LPF, HPF and NF which used lesser controller IO resources by adopting MAX263, X9241U and LTC1068. Meanwhile, it adopted multiplexer as the control logic for conditioning signal direction, to achieve a signal conditioning system which had various conditioning mode to chose and integrated amplifier and filter whose parameters can be adjusted. It showed that the module has significant effect to disturbance factors, and the entire system ensured further the fidelity of the original signal due to all-analog chip, moreover, it was simple to control and took up lesser control resources. Source


Li H.-L.,State Key Laboratory of Geohazard Prevention and Geoenvironment Protection | Li H.-L.,Key Laboratory of Earth Exploration and Information Technology of Ministry of Education | Tuo X.-G.,State Key Laboratory of Geohazard Prevention and Geoenvironment Protection | Tuo X.-G.,Key Laboratory of Earth Exploration and Information Technology of Ministry of Education | And 4 more authors.
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2010

For the detection and positioning of potassium salt deposits, it accomplished muti-channel γ spectrometry measurement using ADC that was embedded in TMS320LF2407 and the corresponding nuclear pulse range system, and achieved the precise measurement of HK-2 potassium salt by effective amplitude stabling and search peak, it also disposaled the spectrometry of HK-2 potassium salt with the technology of spectral line smoothness to fulfill the requirement for system detection. Its energy resolution was up to 7.8%, and double the variance in the count can be achieved to 73.3, twice and three times the variance within the count to achieve 100% when was tested, It obtained satisfactory results in isotope analysis with minerals and the application of alloy imaging system. Source

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