Flow Characteristics of Circular Impinging Jet Accompanying Annular Suction Flow : Optimum Size of Diameter Ratio of Suction Pipe to Injection Pipe and Excess Length of Suction Pipe

2003 ◽  
Vol 2003.56 (0) ◽  
pp. 71-72
Author(s):  
Hisayuki NISHIZONO ◽  
Minoru FUKUHARA ◽  
Tsutomu NOZAKI ◽  
Hidenari YAMASHITA
Keyword(s):  
Flow Characteristics ◽  
Impinging Jet ◽  
Diameter Ratio ◽  
Optimum Size ◽  
Suction Pipe ◽  
Suction Flow

scholarly journals Effect of Pipe-Diameter Ratio on Heat Transfer and Flow Characteristics of Impinging Jet from Coaxial Circular Pipe

2007 ◽  
Vol 27 (Supplement1) ◽  
pp. 95-96
Author(s):  
Junichiro KAI ◽  
Minoru FUKUHARA ◽  
Hiroshi KATANODA ◽  
Naoko IINO ◽  
Akio KAMEDA
Keyword(s):  
Heat Transfer ◽  
Flow Characteristics ◽  
Impinging Jet ◽  
Diameter Ratio ◽  
Pipe Diameter ◽  
Circular Pipe

scholarly journals Effect of Pipe-Diameter Ratio on Flow Characteristics of Impinging Jet from Coaxial Circular Pipe

2009 ◽  
Vol 29-1 (1) ◽  
pp. 327-327
Author(s):  
Yukiko INOMATA ◽  
Minoru FUKUHARA ◽  
Hiroshi KATANODA ◽  
Hidenari YAMASHITA
Keyword(s):  
Flow Characteristics ◽  
Impinging Jet ◽  
Diameter Ratio ◽  
Pipe Diameter ◽  
Circular Pipe

Investigation of suction flow characteristic in the inertance hydraulic converters for efficiency improvement

2021 ◽  
pp. 095965182110248
Author(s):  
Xiaoming Chen ◽  
Yuchuan Zhu ◽  
Travis Wiens ◽  
Doug Bitner ◽  
Minghao Tai ◽  
...  
Keyword(s):  
Flow Rate ◽  
Flow Characteristic ◽  
Performance Indicator ◽  
Flow Characteristics ◽  
Check Valve ◽  
Analytical Models ◽  
Switching Frequency ◽  
Experimental Measurements ◽  
Efficiency Improvement ◽  
Suction Flow

The inertance hydraulic converter relies on fluid inertance to modulate flow or pressure and is considered to be a competitive alternative to the conventional proportional hydraulic system due to its potential advantage in efficiency. As the quantification of fluid inertance, the suction flow characteristic is the crucial performance indicator for efficiency improvement. To explore the discrepancy between the passive inertance hydraulic converter featured by the check valve and the active inertance hydraulic converter driven by an equivalent 2/3 way fast switching valve in regard to suction flow characteristics, analytical models of the inertance hydraulic converters were established in MATLAB/Simulink. The validated models of the respective suction components were incorporated in the overall analytical models and their suction flow characteristics were theoretically and experimentally discussed. The analytical predictions and experimental measurements for the current configurations indicated that the active inertance hydraulic converter yields a larger transient suction flow rate than that of the passive inertance hydraulic converter due to the difference of the respective suction components. The suction flow characteristic can be modulated using the supply pressure and duty cycle, which was confirmed by experimental measurements. In addition, the suction flow characteristics are heavily affected by the resistance of the suction flow passage and switching frequency. There is a compromise between the resistance and switching frequency for inertance hydraulic converters to achieve large suction flow rate.

Flow and Energy Loss Downstream of Rectangular Sharp-Crested Weirs for Free and Submerged Flows

2021 ◽  
Author(s):  
Mahmud R. Amin ◽  
Nallamuthu Rajaratnam ◽  
David Z. Zhu
Keyword(s):  
Energy Loss ◽  
Flow Regime ◽  
Analytical Study ◽  
Flow Characteristics ◽  
Turbulent Jets ◽  
Flow Regimes ◽  
Impinging Jet ◽  
Relative Energy ◽  
Surface Flow ◽  
Upper Stage

Abstract This work presents an analytical study of the flow and energy loss immediately downstream of rectangular sharp-crested weirs for free and submerged flows, using the theory of plane turbulent jets and the analysis of some relevant studies. The flow regimes downstream of the sharp-crested weir is characterized as the impinging jet and surface flow regimes. Based on the flow characteristics and the downstream tailwater depths, each flow regime is further classified, and the relative energy loss equation is developed. It is found that significant energy loss occurs for the regime of supercritical flow and the upper stage of impinging jet flow. The energy loss for the submerged flow regime is minimal.

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