Effect of the Flow Rate on Performance Characteristics of an Axial Flow Hydraulic Turbine with a Collection Device

2018 ◽  
Vol 2018.26 (0) ◽  
pp. 319
Author(s):  
Hiroto SASASHITA ◽  
Yasuyuki NISHI ◽  
Daishi SHIOHARA ◽  
Terumi INAGAKI ◽  
Norio KIKUCHI
Keyword(s):  
Flow Rate ◽  
Axial Flow ◽  
Hydraulic Turbine ◽  
Performance Characteristics ◽  
Collection Device

Performance characteristics of axial flow hydraulic turbine with a collection device in free surface flow field

2017 ◽  
Vol 112 ◽  
pp. 53-62 ◽  
Author(s):  
Yasuyuki Nishi ◽  
Genki Sato ◽  
Daishi Shiohara ◽  
Terumi Inagaki ◽  
Norio Kikuchi
Keyword(s):  
Free Surface ◽  
Flow Field ◽  
Axial Flow ◽  
Free Surface Flow ◽  
Hydraulic Turbine ◽  
Surface Flow ◽  
Performance Characteristics ◽  
Collection Device

scholarly journals Study on an Axial Flow Hydraulic Turbine with Collection Device

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Yasuyuki Nishi ◽  
Terumi Inagaki ◽  
Kaoru Okubo ◽  
Norio Kikuchi
Keyword(s):  
Velocity Ratio ◽  
Axial Flow ◽  
Hydraulic Turbine ◽  
Power Coefficient ◽  
Speed Ratio ◽  
Maximum Output ◽  
Recovery Coefficient ◽  
Composite Body ◽  
Inlet Velocity ◽  
Collection Device

We propose a new type of portable hydraulic turbine that uses the kinetic energy of flow in open channels. The turbine comprises a runner with an appended collection device that includes a diffuser section in an attempt to improve the output by catching and accelerating the flow. With such turbines, the performance of the collection device, and a composite body comprising the runner and collection device were studied using numerical analysis. Among four stand-alone collection devices, the inlet velocity ratio was most improved by the collection device featuring an inlet nozzle and brim. The inlet velocity ratio of the composite body was significantly lower than that of the stand-alone collection device, owing to the resistance of the runner itself, the decreased diffuser pressure recovery coefficient, and the increased backpressure coefficient. However, at the maximum output tip speed ratio, the inlet velocity ratio and the loading coefficient were approximately 31% and 22% higher, respectively, for the composite body than for the isolated runner. In particular, the input power coefficient significantly increased (by approximately 2.76 times) owing to the increase in the inlet velocity ratio. Verification tests were also conducted in a real canal to establish the actual effectiveness of the turbine.

313 Effect of Number of Blades on Performance of an Axial Flow Hydraulic Turbine with a Collection Device

2013 ◽  
Vol 2013.21 (0) ◽  
pp. 127-128
Author(s):  
Kaoru Okubo ◽  
Yasuyuki Nishi ◽  
Sou Hirama ◽  
Terumi Inagaki ◽  
Yukio Kikuchi
Keyword(s):  
Axial Flow ◽  
Hydraulic Turbine ◽  
Collection Device

S051011 Development of Axial Flow Hydraulic Turbine with Collection Device

2012 ◽  
Vol 2012 (0) ◽  
pp. _S051011-1-_S051011-5
Author(s):  
Hironobu IWAMOTO ◽  
Yasuyuki Nishi ◽  
Terumi INAGAKI ◽  
Kaoru OKUBO ◽  
Norio KIKUCHI
Keyword(s):  
Axial Flow ◽  
Hydraulic Turbine ◽  
Collection Device

Performance Characteristics and Flow Field of Axial Flow Hydraulic Turbine in Shallow Open Channel

2018 ◽  
Vol 11 (4) ◽  
pp. 387-399
Author(s):  
Yasuyuki Nishi ◽  
Genki Sato ◽  
Daishi Shiohara ◽  
Terumi Inagaki ◽  
Norio Kikuchi
Keyword(s):  
Flow Field ◽  
Open Channel ◽  
Axial Flow ◽  
Hydraulic Turbine ◽  
Performance Characteristics

scholarly journals A study of the flow field of an axial flow hydraulic turbine with a collection device in an open channel

2019 ◽  
Vol 130 ◽  
pp. 1036-1048 ◽  
Author(s):  
Yasuyuki Nishi ◽  
Genki Sato ◽  
Daishi Shiohara ◽  
Terumi Inagaki ◽  
Norio Kikuchi
Keyword(s):  
Flow Field ◽  
Open Channel ◽  
Axial Flow ◽  
Hydraulic Turbine ◽  
Collection Device

scholarly journals Study on Performance Improvement of an Axial Flow Hydraulic Turbine with a Collection Device

2016 ◽  
Vol 9 (1) ◽  
pp. 47-55 ◽  
Author(s):  
Yasuyuki Nishi ◽  
Terumi Inagaki ◽  
Yanrong Li ◽  
Sou Hirama ◽  
Norio Kikuchi
Keyword(s):  
Performance Improvement ◽  
Axial Flow ◽  
Hydraulic Turbine ◽  
Collection Device

421 Free Surface Flow Analysis of an Axial Flow Hydraulic Turbine with a Collection Device

2014 ◽  
Vol 2014.24 (0) ◽  
pp. 186-189
Author(s):  
Sou Hirama ◽  
Yasuyuki Nishi ◽  
Terumi Inagaki ◽  
Yanrong Li ◽  
Norio Kikuchi
Keyword(s):  
Free Surface ◽  
Flow Analysis ◽  
Axial Flow ◽  
Free Surface Flow ◽  
Hydraulic Turbine ◽  
Surface Flow ◽  
Collection Device

Experimental Study to Test an Axial Flow Pump as a Turbine and Development of Performance Characteristics for Micro-Hydro Power Plant

2007 ◽  
Author(s):  
Javed A. Chattha ◽  
Mohammad S. Khan
Keyword(s):  
Experimental Study ◽  
Flow Rate ◽  
Axial Flow ◽  
Performance Characteristics ◽  
Centrifugal Pumps ◽  
Test Rig ◽  
Hydro Power ◽  
Flow Rates ◽  
Axial Flow Pump ◽  
Flow Pump

Standard centrifugal pumps are manufactured in a large number of sizes in order to cover a wide range of heads and flow rates. Conventional turbines, however, are not mass produced since they are custom designed and manufactured. Therefore, pumps are available in the market at comparatively lower cost and shorter delivery periods. In this paper an experimental study is presented in which the use of pumps as turbine (PAT) is explored for micro-hydro power generation. The objective of the study is to explore cheap alternate sources of energy production in remote locations of Pakistan. Extensive research has been carried out by Williams [1] in the field of using pumps as turbines. Only centrifugal pumps were studied to explore their use as turbines in that work. Since then quite a bit of advancement in this sector of technology has taken place. However, to the best of our knowledge, axial flow pumps have never been tested as turbines. The site conditions for micro-hydro power station usually find axial flow pumps to be more appropriate compared cross flow and pelton turbines. A commercially available axial flow pump was selected and test rig was designed and constructed in order to determine the performance characteristics of using the pump as a turbine. The test bed has a provision of simulating various head and flow rate conditions and dynamometer to measure the power output in order to determine the performance of the turbine. The simulated head and flow rates were varied for various typical conditions. Some minor modifications in the basic pump unit were made to accomplish these tests. The experimental study resulted in generating data for which head was varied from 4 to 12 m and flow rate from 700 to 900 m3/hr. For these conditions power developed ranged from 5–20 kW with a maximum efficiency of 70% corresponding to a head of 6.8 m and a flow rate of 800 m3/hr. Pump affinity laws and the data collected in this experimental study were then used to select a Kaplan turbine. This information was then used to choose a commercially available pump for typical low head and high flow rate conditions in Pakistan to generate about 100 kW of electric power, when running in turbine mode. This paper discusses the design and construction of the test rig to carry out experiments for testing pumps as turbines. Details of experimental procedure and results to determine performance characteristics are also presented. Finally selection procedure of a pump for a specific head and flow condition are also discussed in this paper.

scholarly journals 401 Study on Axial Flow Hydraulic Turbine with Collection Device

2012 ◽  
Vol 2012.20 (0) ◽  
pp. 93-94
Author(s):  
Kaoru OKUBO ◽  
Hironobu IWAMOTO ◽  
Yasuyuki NISHI ◽  
Terumi INAGAKI ◽  
Norio KIKUCHI
Keyword(s):  
Axial Flow ◽  
Hydraulic Turbine ◽  
Collection Device
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