2 edition of Investigations of nozzle discharge coefficients in a compliant air bearing system. found in the catalog.
Investigations of nozzle discharge coefficients in a compliant air bearing system.
Written in English
Thesis (M.A.Sc.) -- University of Toronto, 1999.
|The Physical Object|
|Number of Pages||144|
Transient Measurements of Discharge Coefficients of Diesel Nozzles The discharge coefficient is an important functional parameter of an injector characterising the nozzle flow, in terms of cavitation and hydraulic flip, which subsequently play a crucial role in the spray formation and by:
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INVESTIGATIONS OF NOZZLE DISCHARGE COEFFICIENTS IN A COMPLIANT AIR BEARING SYSTEM Mélanie Beauchemin Master of Applied Science Graduate Department of Aerospace Science and Engineering University of Toronto Abstract A novel compliant air bearing is being developed for matenais handling and low speed guided transportation : Melanie Beauchemin.
Investigation of nozzle discharge coefficients in a compilant air bearing system. Illaster's thesis. University of Toronto Institute for Aerospace Studies. Author: Luke Stras. Throat and wall tappings were used. The flow nozzles were calibrated in water and in high-pressure nitrogen at 20 and 60 barg.
The wall-tapping data are in excellent agreement with the discharge-coefficient equation in ISO all the data for Re d >10 6 fit the equation with twice the r.m.s. deviation equal to %. The data extrapolate well from water to higher Reynolds Author: Michael Reader-Harris.
The most efficient nozzle is generally considered to be that for which the discharge coefficient is nearest unity. Forms and dimensions of the nozzles being equal, the greater the discharge coefficient, the less the jet turbulence becomes.
The inefficiency of fire streams is directly attributable to the inital turbulence of the jet and this turbulence has its chief origin in the flow condition inside the by: 8.
The equation of the discharge coefficient of the flow nozzle is proposed, which consists of the two terms that can be physically evaluated, the theoretical discharge coefficient and the Author: Michael Reader-Harris.
Through comparisons among experimental results, simulation results and prediction results of empirical equations, it was clear that the discharge coefficients were the same for the nozzles with the same throat diameter and were in good agreement with the results of the empirical equations for 10mm nozzles, while that changed with different diffuser angle for other two sets of by: 4.
ILASS – Europe An experimental investigation of discharge coefficient and cavitation length in the elliptical nozzles 2 bances in jet when the flow is cavitating. Especially hysteresis appeared at the aspect ratio is about 5. The dis-charge coefficient had a Cited by: 9. NASA TECHNICAL NOTE NASA TN D r_ z t-== Z DISCHARGE COEFFICIENTS FOR Discharge nozzle coefficient Inclined orifice Orifice Thick-plate Unclassified I Security Classif.
A schematic diagram of the basic setup utilized for the investigation is shown in figure 1o Air at psig ( N/cm 2) was supplied through a filter and dryer File Size: 1MB. the discharge coefficient plays an important role in gas flow measurement by means of critical Venturi nozzles.
It is known that the discharge coefficient of the Venturi nozzle 15 deflned as the ratio of the actual flowrate to one-dimensional ideal flowrate. This coefficient should be characterized for viscous boundary layer and flow fleld File Size: 2MB.
In this paper, various rational, semirational, and, empirical approximations for the ASME long-radius, flow-nozzle discharge coefficients are first reviewed. These approximations are then compared to obtain the most probable representation of ASME flow-nozzle data according to a Cited by: 4.
The diagram below indicates the air leakage or air volume passing through orifices ranging size 1/64 - 1/4 inches. For well rounded nozzles multiply the vlues in the diagram with For sharp edged nozzles multiply the values with 1 psig = kPa = bar; 1 inch = mm; 1 scfm = nl/s.
High velocity impinging air jets are commonly used for heating, cooling and drying, etc. because of the high heat and mass transfer coefficients which are developed in the impingement region. In order to provide data for the designers of industrial equipment, a variety of slot nozzles were tested to determine the effect on heat transfer of both nozzle shape and slot by: 7.
Subscript 0 refers to the stagnation condition. The mass flow rate is a maximum for nozzles at chocked condition (M =1). The discharge coefficient differs from unity due to the nonuniformity of flow parameters (such as Mach number) at the nozzle exit and presence of boundary layer (viscous effect).Cited by: 6.
To study the discharge coefficients of aerostatic bearings, a new numerical method which combines the method of “separation of variables” for solution of laminar boundary-layer equations and. 9fficient or shortly to the nozzle coefficient to indicate the nozzle CAPACITY AT A GIVEN PRESSURE VALUE WHEN K KHOWN CTG SH 07 EU for nozzles using part of the flow energy to produce wide nozzles, and straight jet nozzles.
r each nozzles are used in practice when a precise result must to be equal to 1, (P 1 bar), the flow rate of the nozzleFile Size: KB.
system (WMFSS) would use very small amount of water to extinguish a fire. System components include water source, water pump, pipe works, and nozzles. System performance depends on the design of those components. The nozzle is a key component as the droplets size and velocity distribution at an operating pressure and a flow rate are.
the discharge coefﬁcient associated with these ﬁlm hole geome-tries as a function of ﬂow parameters on both sides of the ﬁlm holes. Discharge coefﬁcients associated with many oriﬁce geome-tries and ﬂow conditions have been under investigation by many.
Abstract The discharge coefficient in critical nozzles flowing N 2, Ar, CO 2, and H 2 in the Reynolds Number range (2, to 22,) is studied computationally to assess the capability of Computational Fluid Dynamics (CFD) in assisting experimental calibration.
A parametric study is conducted to investigate the effects of the wall thermal boundary condition and gas species on the calibration Cited by: for determining the discharge coefficient of this venturi. An experimental investigation was conducted to determine the discharge coefficient of such a venturi, and the results are compared with the theoretical values.
This investigation covered a range of Reynolds number from 0. 4 x 10^ to x 10° based on venturi throat Size: 2MB.
taps, and flat rail surface used to generate the air bearing (drawing not to scale). Figure Layout of the nozzles and pressure taps currently instaîled in the lower plate of the apparatus (upper diagram), and a representative depiction of the air supply system, including the noule geometry (lower diagram).Author: Bryan R.
Townsend. Nozzle geometry variations on the discharge coef ﬁ cient 23 signi ﬁ cant in ﬂ uences on the discharge coef ﬁ cient, pro ﬁ le of sonic lines and on the nozzle downstream ﬂ ow features. Variation of air core diameter, coefficient of discharge and spray cone angle with liquid flow rate in the nozzle.
d s =8 mm, d o =2 mm, l s =1 mm, 2 α =41 ∘, l o =4 mm. The formation of a central air core in a simplex nozzle is the consequence of a reduction in pressure near the nozzle axis because of the swirling flow of liquid inside by: In a nozzle or other constriction, the discharge coefficient (also known as coefficient of discharge or efflux coefficient) is the ratio of the actual discharge to the theoretical discharge, i.e., the ratio of the mass flow rate at the discharge end of the nozzle to that of an ideal nozzle which expands an identical working fluid from the same initial conditions to the same exit pressures.
Yin, Z.-Q., et al.: Discharge Coefficient of Small Sonic Nozzles THERMAL SCIENCE, YearVol. 18, No. 5, pp. where ρ is the gas density, ui and uj are the speeds in both directions; p is the pressure, µ – the dynamic viscosity, Re – the Reynolds number, and i, j correspond to the x, y coordinate.
Geometry and boundary condition. for the discharge of Die el engin e fuel oil aL 0° F. into air aL pressure up to 1, pounds per square inch using a inch orifice. Two air chamber were used in order to determine the efl" ect of a change in chamber sizc.
In the te ts with the small air chamber, hydrauli pres me::;File Size: 9MB. Moss: w = aCp1 T 1 where w = discharge in lb per sec, a = area of orifice in sq.
in., C = coefficient of flow, p1 = upstream total pressure in psia, and T1 = upstream temperature in deg. F abs. • Values used in calculating above table were C =p1 = gage pressure + psi, T1 = F abs.
This study investigated the influences of bearing geometry and flow parameters on the discharge coefficient in aerostatic bearings with pocketed orifice restrictors.
Finite difference method calculation. In aerostatic bearings, an air film separates the bearing surface from the reaction by: Investigations for Discharge Coefficient of PTC 6 Flow Nozzle in a Wide Range of Reynolds Number The discharge coefﬁcients of the ﬂow nozzles based on ASME PTC 6 are measured in a wide range of Reynolds number from Re d ¼ 10 4 to Re d 7, and the equa-tions of the discharge coefﬁcients are developed for the laminar, the.
meansofflownozzles,lowofairis not perfectly steady,thecapacity between the orifice and theflow nozzle on theend of the line introducesatime lag, sothat, though theFile Size: 9MB. Identification of Discharge Coefficients of Orifice-Type Restrictors for Aerostatic Bearings and Application Examples Chapter (PDF Available) April with Reads How we measure 'reads'.
Discharge Coefficient is the ratio of actual discharge through a nozzle or orifice to the theoretical discharge. Commonly known as coefficient of discharge, it is related to the flow and pressure loss through nozzles and the orifices in the fluid systems or fluid mechanics.
It is denoted by “Cd” and is a dimensionless number. number range extended up to 8x Discharge coefficients for both nozzles monotonically increase in value at the high throat Reynolds numbers. The percent confidence band for each nozzle is shown. Analytical discharge coefficients for the continuous and finite radius of curvature nozzle are Size: 1MB.
Flow coefficient measurements for an engine cylinder head under transient flow conditions with continuous valve lift change Daesan Oh1, Choong Hoon Lee 2* 1 Researcher, 2nd Seoul Team, Defense Agency for Technology and Qual Hoegi-ro, Dongdaemun-gu, Seoul, KoreaFile Size: KB.
In rotating air bearings, this effect produces high orders of rotational accuracy and smoothness of travel. Typical T.I.R. for air bearing spindles are less than µinch. For linear slides, pitch, roll and yaw errors of much less than a fraction of an arc second are attainable and straightness of travel errors on the order of nanometers have.
Determining the Coefficient of Discharge for a Draining Container efficiently determine the coefficient of discharge for such a system. Prior work in physics education literature has devel- round-edged orifice such as a nozzle, the change in cross- sectional area of the jet occurs within the nozzle itself.
An-File Size: KB. discharge coefficient and flow coefficient are used to quantify the changes in intake flow at different valve lifts variation.
Results show that when valve lift increases, this inflicted the increase in discharge coefficient because of greater mass flow rate of induction air. Both flow and discharge coefficient is dependent on valve Size: KB. An experimental study of high-speed rotor supported by air bearings: test RIG and first experimental results.
pressures throughout the clearance by integrating the time-dependent Reynolds equation and considering two different nozzle equivalent discharge by: temperature is invariant along the nozzle flow, and the nondissipative assumption implies that - total pressure is also invariant, i.e.
t = T. and. t = p. • Discharge conditions: p. 0, i.e. the environmental pressure (or back pressure), is the only variable of importance (because pressure waves propagate at the local speed of File Size: KB.
The standard flat-fan nozzles had the highest discharge coefficients, while the air-induction nozzles had the lowest discharge coefficients. For a fixed type of nozzle design, the discharge coefficient increased slightly with the rated flow rate.
The discharge coefficient decreased slightly with increasing pressure for a given nozzle. The discharge coefficient (Cd) is a measure of how much of the pressure energy of a nozzle is converted into kinetic energy. With the discharge coefficient known, the exit velocity of the liquid shee t from the nozzle can be calculated from the pressure.
It is important to be able to accurately calculate this nozzle exit velocity for use in initializing computational simulations such as AGDISP Author: Scott L Post, Rory L Roten, Robert J Connell. for Mini Flow or Portable Sonic Nozzle-Based Turbine Component Airflow Test Systems The proposed test stand will have a set of critical flow venturis (sonic nozzles) installed inside a common plenum chamber that is located upstream of the turbine component to be tested.
A dried and conditioned compressed air system in conjunction with a pressure.Theoretical Discharge and Reaction Solid Bore Nozzles (PDF) - View the nozzle pressure, gallons per minute (GPM), reaction force in pounds and bore dimensions for solid bore nozzles Fog Nozzles (PDF) - View the GPM settings, gallons per minute (GPM), reaction force in pounds and nozzle pressure at inlet for fog nozzles.Discharge Coefficient, Flow Exponent, and Leakage Area C, n, Flow Coefficient, Flow Exponent /(s x [n]) Sliding Lock On Lock Off Lift Sliding Lock On Lock Off Air Leakage Coefficient of Area, Determination /  Sliding Lock On Lock Off Lift Sliding Lock On Lock Off