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Showing 1 to 20 of 28 for “"discharge coefficient"”.
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Study Of Discharge Coefficient And Trends In Film Cooling Effectiveness Of Conical Holes With Increasing Diffusion Angles
… improvement in their film cooling effectiveness. Discharge coefficient and film cooling effectiveness measurements are conducted to characterize this behavior. Part of the focus of this investigation is to find out how this trend develops and attempt to ascertain the optimum cone angle, if …
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A relaxation method for the solution of rotational transonic nozzle flow
… effects were found to produce a reduction in discharge coefficient of only 0.1 to 0.6%. Whereas, nonuniform inlet flow effects produced an additional decrease in the discharge coefficient of about 1%. Agreement with the solutions of Oswatitsch and Rothstein (18) and Wehofer and Moger (6) is …
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Performance of reduced-scale Vortex amplifiers used to control glovebox dust
… port area to exit port area has no influence on discharge coefficient (at least within the scope of current work). It is also identified that the ratio of chamber height to exit port radius does not affect the discharge coefficient or two angle parameters. Doubling chamber height, supply port …
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Direct numerical investigation and reduced-order modeling of 3-D honeycomb acoustic liners
… boundary layers play in determining the orifice discharge coefficient which is an important indicator of liner non-linearity. It is observed that when the liner behavior is not well described by linear models, the orifice boundary layers contain secondary vorticity generated from its separation …
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Estimating Flow Through Rock Weirs
… of knowledge exists relating to the stage-discharge relationship of these structures. Therefore, the goal of this research was to determine a weir equation and corresponding discharge coefficients that improve predictions of flow through rock weirs. A flume study was conducted to develop a …
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Characteristics of dividing and combining flows
… The first part of the study considers the discharge characteristics of flow past a two-dimensional lateral slot located in a rectangular conduit. Existing theoretical solutions to this problem are based on free streamline theory. The test results provide data to verify the predictions of …
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Turbocharger Turbines: An Experimental Study on the Effects of Wastegate Size and Flow Passage Design
… revealed that the Honeywell wastegate discharge coefficient is higher than both BorgWarner wastegates at 40¿¿ for fixed ER-ts, and it was either equivalent to or slightly greater than the 26 mm BorgWarner wastegate at smaller openings. The discharge coefficient for the 20 mm BorgWarner …
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Discharge coefficients for broad-crested weirs of low aspect ratios
… previously developed theoretical analysis of the discharge coefficient for broad-crested weirs is investigated. Experimentally determined discharge coefficients are presented for a broad-crested weir of small crest width in an attempt to verify the theory, and an investigation of the geometry of …
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Experimental investigation of cavitation in a cylindrical orifice
… cavitation numbers, K, from 1.1 to 3.5. Nozzle discharge coefficient was also measured across the entire experimental range. Periodic shedding of cavitation clouds was found to occur for the partial cavitation regime. Spectral analysis revealed the frequencies associated with this shedding to …
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A study of tip-leakage flow through orifice investigations
… greater than 10*. Measurements were made of the discharge coefficient as a function of back pressure ratio for a sharp-edged orifice and long orifices with an l/d from 1/2 to 8. The discharge coefficient measurements indicate the mass flow rate in an orifice with an l/d of approximately 2 is the …
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Modeling and characterizing bi-directional airflow in natural ventilation
… In the 1st model, a new concept of "local discharge coefficient" is proposed for its consistency under different boundary conditions. The influence of radiative heat transfer on simulation accuracy and ventilation performance is also investigated. In the 2nd model, the transient behaviors …
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Adjoint-based geometry optimisation with applications to automotive fuel injector nozzles
… The optimisation is performed by means of discharge coefficient (Cd) maximisation. The objective is to design nozzle hole shapes that maximise the nozzle Cd for a given basic nozzle geometry (i.e. needle and sac profile) and reduce or even eliminate the negative pressure region formed at …
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Calibration of orifice plates with special emphasis on edge sharpness and eccentricity
… emphasis is laid on the factors influencing the coefficient of discharge Of orifice plates and. on the difference between the various engineering standards. Particular consideration is given to the effect on the discharge coefficient of rounding the upstream edge of the orifice plate and of …
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The Steady Performance of Complaint-surface Aerostatic Thrust Bearings
… the experiments if the experimentally determined discharge coefficient and the roughness of bearing surfaces are taken into account. Experimental determination of elastomer properties, i.e. bulk modulus and elastic modulus, indicated that the former is several orders of magnitude larger than the …
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Modeling and Experimental Validation of Disc and Reed Style Check Valves for Hydraulic Applications
… as quasi-steady orifice flow using an empirical discharge coefficient. A non-contact method of experimentally measuring check valve position during operation using a laser triangulation sensor (LTS) was developed. An acrylic viewing window was installed in the check valve manifold to allow …
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NON-DIMENSIONAL DATA-DRIVEN MODELS OF COMPUTATIONAL FLUID DYNAMICS (CFD) OF MULTI-PHASE FLOW IN ANNULUS
… ratio to cause cavitation, and the corresponding discharge coefficient of the annulus system under two-phase (liquid, vapor) flow condition. The second model extended to the three-phase (liquid, vapor, air) situation, closer to the actual offshore BOP working conditions. Using the obtained …
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Tyre Inflation Pressure control to improve vehicle ride comfort on rough roads
… system parametrisation tests show that the discharge coefficient is approximately 0.07 for choked flow and tappers off to zero for unchoked flow. Also, tests show that the tyre can be inflated from 1.0 bar to 3.0 bar in 8 s and deflated from 3.0 barto 1.0 bar in 13 s. The APG bump tests and …
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Computer aided mathematical modelling of turbulent flow for orifice metering
… of output quantities of interest such as discharge and pressure loss coefficients. The model vas tested for convergence and general adequacy on an orifice of diameter ratio β= .7 in a 4 inch pipe line and at a Reynolds number of 105. Quantitative tests were then conducted on thin orifice …
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