Three-Dimensional Flow Analysis for Estimation of Measuring Error of Orifice Flowmeter Due to Upstream Flow Distortion

2002 ◽  
Author(s):  
Hong-Min Kim ◽  
Kwang-Yong Kim ◽  
Jae-Young Her ◽  
Young-Chul Ha
Keyword(s):  
Flow Analysis ◽  
Three Dimensional ◽  
Turbulence Models ◽  
Measuring Error ◽  
Flow Distortion ◽  
Three Dimensional Flow ◽  
Pipe System ◽  
Orifice Flow ◽  
Orifice Flow Meter ◽  
Upstream Flow

Three-dimensional pipe flows with elbows and tees are calculated to estimate the effect of upstream flow distortion on measuring accuracy of orifice flow meter. Axisymmetric flows through orifice are calculated first to evaluate the performances of various numerical schemes and turbulence models. In three-dimensional calculations of the flow in pipe system, it is evaluated how the pressure difference across the orifice is dependent on the length of upstream straight pipe in a branch. From the results, it is found that, regardless of flow rate, the effect of the length can be neglected for the lengths larger than thirty diameters although there still remain significant swirl at the orifice.

Optimization of the Three-Dimensional Flow Path in the Scroll-Nozzle System of a Radial Inflow Turbine

1984 ◽  
Vol 106 (2) ◽  
pp. 511-515 ◽  
Author(s):  
E. A. Baskharone
Keyword(s):  
Flow Analysis ◽  
Three Dimensional ◽  
Inviscid Flow ◽  
Three Dimensional Flow ◽  
Multiply Connected ◽  
Dimensional Flow ◽  
Nozzle Configuration ◽  
Flow Domain ◽  
Radial Inflow Turbine ◽  
Compressibility Effects

A three-dimensional inviscid flow analysis in the combined scroll-nozzle system of a radial inflow turbine is presented. The coupling of the two turbine components leads to a geometrically complicated, multiply-connected flow domain. Nevertheless, this coupling accounts for the mutual effects of both elements on the three-dimensional flow pattern throughout the entire system. Compressibility effects are treated for an accurate prediction of the nozzle performance. Different geometrical configurations of both the scroll passage and the nozzle region are investigated for optimum performance. The results corresponding to a sample scroll-nozzle configuration are verified by experimental measurements.

Three-Dimensional Flow Analysis in a Faraday-Type MHD Generator

2008 ◽  
Vol 44 (4) ◽  
pp. 1116-1123 ◽  
Author(s):  
Triwahju Hardianto ◽  
Nobuomi Sakamoto ◽  
Nobuhiro Harada
Keyword(s):  
Flow Analysis ◽  
Three Dimensional ◽  
Three Dimensional Flow ◽  
Mhd Generator ◽  
Dimensional Flow

Improving Startup Behavior of Fluid Couplings Through Modification of Runner Geometry: Part I—Fluid Flow Analysis and Proposed Improvement

2000 ◽  
Vol 122 (4) ◽  
pp. 683-688 ◽  
Author(s):  
H. Huitenga ◽  
N. K. Mitra
Keyword(s):  
Flow Field ◽  
High Speed ◽  
Flow Analysis ◽  
Three Dimensional ◽  
Operation Condition ◽  
Three Dimensional Flow ◽  
Economical Design ◽  
Hydrodynamic Coupling ◽  
Turbine Runner ◽  
Fluid Flow Analysis

For the use as a startup device the characteristic of a hydrodynamic coupling has to be steep at the nominal high speed operation condition and flat in the range of lower speed ratios. The economical design of the runner requires that the mass and the volume of the coupling should be as small as possible. The flow field in a starting configuration is simulated and a detailed analysis of the three-dimensional flow field is performed to deduce constructional modifications which meet both requests. The analysis shows that several modifications on pump and turbine runner seem to be successful. The consequences of the variation of the runner geometries will be discussed in detail in Part II of this paper. [S0098-2202(00)02104-0]

Sign in / Sign up

Export Citation Format

Share Document