A Modern Laboratory for Hydraulic Turbine and Pump/Turbine Model Performance Testing

1974 ◽  
Vol 96 (1) ◽  
pp. 55-61
Author(s):  
G. R. Frey ◽  
R. L. Rohrbaugh ◽  
W. G. Whippen
Keyword(s):  
Data Acquisition ◽  
Model Performance ◽  
Performance Testing ◽  
Hydraulic Turbine ◽  
Model Testing ◽  
Testing Time ◽  
Laboratory Design ◽  
Electronic Instrumentation ◽  
Hydraulic Turbines ◽  
Improved Performance

Increased demands for higher performance, reliability, and versatility from hydraulic turbines and pump/turbines have dictated that manufacturers improve their model testing facilities to thoroughly evaluate individual designs as required by customer specifications. Advances in supporting technology, particularly electronic instrumentation, data acquisition, and motor/generator control, have significantly improved performance data and have reduced testing time to a minimum. This paper discusses a new laboratory design, incorporated by the Hydro-Turbine Division of Allis-Chalmers Corporation for model testing, including the building, the flexible test circuits, the data acquisition system, the power generation system, and the model test stand.

Numerical Prediction of Critical Cavitation Performance in Hydraulic Turbines

2003 ◽  
Author(s):  
Sadao Kurosawa ◽  
Kiyoshi Matsumoto
Keyword(s):  
Flow Model ◽  
Flow Analysis ◽  
Prediction Method ◽  
Hydraulic Turbine ◽  
Francis Turbine ◽  
Two Phase ◽  
Cavitation Performance ◽  
Hydraulic Turbines ◽  
Critical Cavitation ◽  
Good Agreement

In this paper, numerical method for predicting critical cavitation performance in a hydraulic turbine is presented. The prediction method is based on unsteady cavitation flow analysis to use bubble two-phase flow model. The prediction of the critical cavitation performance was carried out for the aixal hydraulic turbine and the francis turbine as a typical examples. Results compared to the experiment showed a good agreement for the volume of cavity and the performance drop off and it was recognized that this method could be used as an engineering tool of a hydraulic turbine development.

Boosting the Capabilities of Gas Stand Data Acquisition and Control Systems by Using a Digital Twin Based on a Holistic Turbocharger Model

2021 ◽  
Author(s):  
José R. Serrano ◽  
Luis Miguel García-Cuevas ◽  
Vishnu Samala ◽  
Juan Antonio López-Carrillo ◽  
Holger Mai
Keyword(s):  
Data Acquisition ◽  
Control Systems ◽  
Heat Fluxes ◽  
Testing Time ◽  
Time Saving ◽  
Digital Twin ◽  
Dimensional Modeling ◽  
On Line ◽  
And Control

Abstract During the last decade, increasingly advanced turbocharger models have been developed for sizing, engine matching and one-dimensional modeling. This work goes further and, instead of using these models for turbocharged engines design or analysis, it implements them in the data acquisition and control system of a turbocharger gas stand. This way, interesting new capabilities arise. The paper shows that there are important synergies between advanced turbocharger gas stand data acquisition and control systems and the modern turbocharger holistic models that have not been deeply exploited until now. They can be summarized as: on-line heat fluxes analysis, in-situ outlier testing points detection, testing time saving and using digital-twin techniques to monitor turbocharger health during testing.

scholarly journals Effect of Sediment Size in Hydraulic Turbine Material: A Case Study of Roshi Khola in Nepal

2013 ◽  
Vol 13 (2) ◽  
pp. 129-132
Author(s):  
Laxman Poudel
Keyword(s):  
Weight Loss ◽  
High Velocity ◽  
Hydraulic Turbine ◽  
Direct Impact ◽  
Test Rig ◽  
Reservoir Capacity ◽  
Sediment Size ◽  
Micron Size ◽  
Hydraulic Turbines

Siltation problem in Nepal is major and challenging in hydropower development. It degrades the reservoir capacity and hydraulic turbines’ efficiency. Many researches have been carried out in this field and have proven sand as major substance that erodes the turbine material, but only few researches have accounted every parameters of sand on degradation of hydraulic turbines. This paper accounts size of sediments important parameter that has direct impact on turbine material. Sediment size impact has been studied firstly by characterizing size into six layered using sieve analyzer and testing its impact using high velocity test rig at Kathmandu University. Sand samples from 20 different stations of Roshi river were collected and tested on turbine material 18Cr4Ni. It found that greater micron sizes of sediments have great impact was than relatively smaller ones. It is depicted that 300-400 micron size sediment, have highest impact with weight loss of 0.022 milligram, 212-300 micron size has 0.013 milligram weight loss, 90-212 micron size has 0.012 and below 90 micron sizes have 0.0075 milligram of weight loss. Nepal Journal of Science and Technology Vol. 13, No. 2 (2012) 129-132 DOI: http://dx.doi.org/10.3126/njst.v13i2.7725

Investigations Of Pressure Pulsations In A Model Of Draft Tube Of Hydraulic Turbine Caused By Vortex Rings

2016 ◽  
Vol 11 (4) ◽  
pp. 25-32
Author(s):  
Sergey Skripkin ◽  
Mikhail Tsoy ◽  
Sergey Shtork ◽  
Pavel Kuibin
Keyword(s):  
Vortex Ring ◽  
High Speed ◽  
Draft Tube ◽  
Hydraulic Turbine ◽  
Vortex Rings ◽  
Experimental Investigations ◽  
Visualization Technique ◽  
Vortex Rope ◽  
Hydro Turbine ◽  
Hydraulic Turbines

Current work is devoted to experimental investigations of behavior of precessing vortex rope in a draft tube model of hydraulic turbine. We used combination of stationary and freely rotating swirlers as a hydro turbine model. Such construction provides velocity distribution on the draft tube inlet close to distribution in natural hydraulic turbines operated at non-optimal conditions. The phenomenon of precessing vortex rope reconnection with further formation of vortex ring was founded in this experimental research using high-speed visualization technique. Synchronization of highspeed visualization and pressure measurements allowed us to relate pressure shock on the draft tube wall with vortex ring moving along wall.

An improved model for predicting the efficiency of hydraulic propeller turbines

2005 ◽  
Vol 32 (5) ◽  
pp. 789-795 ◽  
Author(s):  
Jessica Manness ◽  
Jay Doering
Keyword(s):  
Performance Test ◽  
Performance Testing ◽  
Field Performance ◽  
Large Data ◽  
Hydraulic Turbine ◽  
Original Method ◽  
Large Network ◽  
Periodic Field ◽  
Data Set ◽  
Efficient Operation

Field performance testing of hydraulic turbines is undertaken to define the head-power-discharge relationship that identifies the peak operating point of the turbine. This relationship is essential for the efficient operation of a hydraulic turbine. Unfortunately, in some cases it is not feasible to field test turbines because of time, budgetary, or other constraints. Gordon (2001) proposed a method of predicting and (or) simulating the performance curve for several types of turbines. However, a limited data set was available for the development of his model for certain types of turbines. Moreover, his model did not include a precise method of developing performance curves for rerunnered turbines. Manitoba Hydro operates a large network of hydroelectric turbines, which are subject to periodic field performance testing. This provided a large data set with which to refine the model proposed by Gordon (2001). Furthermore, since these data include rerunnered units, this provides an opportunity to refine the effects of rerunnering. Analysis shows that the accuracy of the refined model is within 2% of the performance test results for an "old" turbine, while for a newer turbine or a rerunnered turbine the error is within 1%. For both an old turbine and a rerunnered turbine, this indicates an accuracy improvement of 3% over the original method proposed by Gordon (2001).Key words: hydraulic turbine, efficiency, simulation modeling

Selection of the Hydraulic Turbines for the Mammoth Pool Project

1961 ◽  
Vol 83 (2) ◽  
pp. 177-182
Author(s):  
Horace E. Burrier
Keyword(s):  
Power Generation ◽  
Economic Analysis ◽  
Hydraulic Turbine ◽  
Final Evaluation ◽  
Reaction Type ◽  
Operating Range ◽  
Hydraulic Turbines ◽  
Static Head ◽  
Type Power ◽  
Selection Of

Mammoth Pool Project has a normal static head of 1100 ft which is within the operating range of either the impulse or reaction type hydraulic turbine. An economic analysis is made for using two 88,000 hp turbines, either of the multinozzle impulse or of the reaction type. Power generation and motoring operations of each type are evaluated with the final evaluation justifying the selection of two reaction turbines for this powerhouse.

scholarly journals Performance Comparison of PD Data Acquisition Techniques for Condition Monitoring of Medium Voltage Cables

Energies ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 4272 ◽  
Author(s):  
Muhammad Shafiq ◽  
Ivar Kiitam ◽  
Kimmo Kauhaniemi ◽  
Paul Taklaja ◽  
Lauri Kütt ◽  
...  
Keyword(s):  
Data Acquisition ◽  
Condition Monitoring ◽  
Partial Discharge ◽  
Performance Comparison ◽  
Practical Implementation ◽  
Monitoring Methods ◽  
Medium Voltage ◽  
Cable Networks ◽  
Improved Performance ◽  
Diagnostic Capabilities

Already installed cables are aging and the cable network is growing rapidly. Improved condition monitoring methods are required for greater visibility of insulation defects in the cable networks. One of the critical challenges for continuous monitoring is the large amount of partial discharge (PD) data that poses constraints on the diagnostic capabilities. This paper presents the performance comparison of two data acquisition techniques based on phase resolved partial discharge (PRPD) and pulse acquisition (PA). The major contribution of this work is to provide an in-depth understanding of these techniques considering the perspective of randomness of the PD mechanism and improvements in the reliability of diagnostics. Experimental study is performed on the medium voltage (MV) cables in the laboratory environment. It has been observed that PRPD based acquisition not only requires a significantly larger amount of data but is also susceptible to losing the important information especially when multiple PD sources are being investigated. On the other hand, the PA technique presents improved performance for PD diagnosis. Furthermore, the use of the PA technique enables the efficient practical implementation of the continuous PD monitoring by reducing the amount of data that is acquired by extracting useful signals and discarding the silent data intervals.

Optimal Twisting of Blades in Axial Turbomachines

1979 ◽  
Vol 21 (5) ◽  
pp. 367-371
Author(s):  
Y. A. Lesokhin
Keyword(s):  
Gas Turbines ◽  
Quantitative Relationship ◽  
Hydraulic Turbine ◽  
Aerodynamic Performance ◽  
Flow Path ◽  
Geometric Parameters ◽  
Axial Compressors ◽  
Wide Range ◽  
Hydraulic Turbines ◽  
Design And Testing

One possible way to improve the aerodynamic performance of turbomachines is to analyse and generalize existing results obtained from design and testing. These can be applied to develop a quantitative relationship between the geometry of various regions of the flow path and turbomachine performance. An optimal correlation between various geometric parameters can be established in this manner. By studying blade geometry of various kinds of axial turbomachine (compressors, gas turbines, hydraulic turbines and pumps), the author has found some regularities in their geometry which enabled the design of highly efficient blades. Regularities in the twisting of impeller blades of axial compressors working over a wide range of Mach numbers are represented in this work. Information is presented showing that analogous regularities exist also for axial hydraulic turbine and pump blades.

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