Correction to “An Investigation of the Novel Testing Setup for the Dynamic Characterization of Super High-Pressure High-Speed Switch Valves”

The mechanical strength of a fiber-metal laminate is not so well explored at high strain rates, although its constituents are prone to exhibit such effects. In this paper, we describe an investigation of aluminium-fiber glass material using the Split Hopkinson bar device. We report on various experimental issues related to these tests, giving some emphasis to the use of high speed filming to obtain information on the specimen strain and strain rate.

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Challenges in the Petrophysical and Dynamic Characterization of Deepwater Turbidite Deposits of the Colombian Caribbean Offshore–A Case Study

Petrophysics – The SPWLA Journal of Formation Evaluation and Reservoir Description ◽

10.30632/pjv62n2-2021a2 ◽

2021 ◽

Vol 62 (2) ◽

pp. 156-174

Author(s):

Juan Alejandro Angel Restrepo ◽

◽

Ricardo Andrés Gómez-Moncada ◽

Carlos Alberto Mora Sánchez ◽

Ricardo Bueno Silva ◽

...

Keyword(s):

High Pressure ◽

High Resolution ◽

Production Performance ◽

Dynamic Characterization ◽

Pore Throat ◽

Throat Radius ◽

True Nature ◽

Mercury Injection ◽

Vertical Heterogeneity

The Colombian Caribbean region has become an important exploratory target, and recent discoveries confirm its potential as a gas province to overcome the expected near-future gas deficit. A petrophysical and dynamic characterization workflow was implemented for this challenging deepwater play, where the depositional environment is the result of turbidity current processes. The reservoirs consist mostly of thin to very thin sand layers, corresponding mainly to the Ta, Tb, and Tc divisions of the Bouma sequence as observed in the cored intervals. Bouma divisions Td and Te are related with the lowest rock quality and represent the nonreservoir intervals. The greatest challenge in the characterization of this particular reservoir is the vertical resolution, given the very low thickness of the layers, which becomes very difficult to detect using standard resolution logs. Thus, tomography images, resultant CT-scan curves, and their integration with routine and special core analyses were used to reveal the true nature of this complex reservoir. The proposed methodology focuses on the integration of routine and special core analysis for the petrophysical and dynamic characterization of the reservoir, where the pore-throat-radius distribution from high-pressure mercury injection becomes the basis of the differentiation between what is considered reservoir and what is not. Pore-throat radius estimated from high-pressure mercury injection (R35) correlates extremely well with textural features and clay content in the rock; therefore, this parameter (R35) was used to define the different classes for rock typing. The approach taken was to develop a multilinear regression model of R35 as a function of very high-resolution tomography outputs in the cored zones and then see how it may be extrapolated to the uncored zones using available high-resolution logs. Special petrophysical analyses, such as NMR low field, porous-plate capillary pressure, electrical properties, and relative permeability curves (steady state), showed correlation with the defined rock types and, in turn, allowed for a determination of the gas accumulation potential of the area. Finally, rock and fluid (dry-gas) properties have been used to build a single-well radial model to design initial well tests (DST) and predict production performance from each interval (selective tests). The simulation model represents the lateral and vertical heterogeneity related to the geological environment (turbidites). The final results have defined the flow and shut-in times during tests to optimize the budget.

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Preparation and characterization of paclitaxel nanosuspension using novel emulsification method by combining high speed homogenizer and high pressure homogenization

International Journal of Pharmaceutics ◽

10.1016/j.ijpharm.2015.05.070 ◽

2015 ◽

Vol 490 (1-2) ◽

pp. 324-333 ◽

Cited By ~ 30

Author(s):

Yong Li ◽

Xiuhua Zhao ◽

Yuangang Zu ◽

Yin Zhang

Keyword(s):

High Pressure ◽

High Speed ◽

High Pressure Homogenization

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Dynamic Characterization of an Additive Manufactured Turbine Wheel of Turbocharger

Volume 1: Compressors, Fans, and Pumps; Turbines; Heat Transfer; Structures and Dynamics ◽

10.1115/gtindia2019-2457 ◽

2019 ◽

Author(s):

Panneer Selvam R. ◽

Muthukannan Duraiselvam ◽

Sanjay G. Barad ◽

Dilip Kumar

Keyword(s):

Dynamic Characteristics ◽

High Speed ◽

Conventional Technique ◽

Mode Shapes ◽

Modal Parameters ◽

Dynamic Characterization ◽

Turbine Wheel ◽

Correlation Studies ◽

Simulated Environment

Abstract Experimental Modal Analysis (EMA) is a conventional technique for establishing the modal parameters of the components. The modal parameters are the dynamic characteristics viz. frequency, mode shapes and damping that are used for assessing and validating the design predictions through correlation studies. For this task EMA technique is adopted to assess the dynamic characteristics of an additive manufactured (AM) turbine wheel of a turbocharger. Correlation studies are undertaken to validate the theoretical model developed. These Correlation studies ensured that there is no major deviations to proceed for high speed spin testing of this turbine wheel in simulated environment. The possible interference or resonances in the operating range are identified for safe operation of the test rotor.

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Comparison of Blade Tip Timing With Strain Gauge Data for Evaluation of Dynamic Characterization of Last Stage Blade With Interlocked Shroud for Steam Turbine

Volume 7C: Structures and Dynamics ◽

10.1115/gt2018-76264 ◽

2018 ◽

Cited By ~ 1

Author(s):

Jiamin Zhang ◽

Peng Shan ◽

Kai Cheng ◽

Dechao Ye

Keyword(s):

Steam Turbine ◽

Strain Gauge ◽

High Speed ◽

Aircraft Engine ◽

Dynamic Strain ◽

Dynamic Characterization ◽

Speed Test ◽

Gauge Data ◽

Last Stage

The tip-timing technology has been widely developed and has become an industry standard in aircraft engine and gas turbine over past decade. The main application of the tip-timing method is to verify safe operation of blades and monitor the health of blades. But tip-timing technology gets rarely used to the last stage blade of steam turbine. Particularly the blade is designed with an integral shroud, snubber and fir-tree root. The article mainly describes the process of identifying the dynamic characterization of last stage blade with an integral shroud and snubber by contactless measurements provided by tip-timing technology. Attention is focused on the comparison of tip-timing results with the results from strain gauge data. Firstly, the frequency response of the bladed blisk is calculated by using Computer-Aided-Engineering (CAE) technologies. Secondly, according to the results of finite element modal calculation, the location of strain gauge is confirmed. The dynamic strain of blade is measured by utilizing telemetry technology. Finally, according to the design features of integral shroud, the tip-timing probe locations must be accurately confirmed in order to acquire the valid data. All probes are positioned along the radial direction of blades. The rotating vibration test of the bladed blisk has been carried out in the high-speed test rig. In order to validate the tip-timing measurement, all the results from the tip-timing, especially the resonant frequencies and damping ratios, are compared with results from the strain gauges with which only a few blades were equipped.

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