1 edition of Investigation of the effect of form of orifices for the Pitot tube found in the catalog.
Investigation of the effect of form of orifices for the Pitot tube
Louis Solliday Knorr
Written in English
|Statement||by Louis Solliday Knorr|
|The Physical Object|
|Pagination||20 leaves :|
|Number of Pages||20|
both the L-type and S-Type Pitot tubes. Figure 2: The S Type Pitot tube. Pitot tube theory The operation of the Pitot tube is dependent on a fundamental theory of fluid flow, which states that in a steady state, closed system, there is conservation of energy along a flow line. This was first described by Daniel Bernoulli in the 18th Century. Determine the aerodynamic interference effects due to the S-type pitot tube and the sampling probe being in close proximity to one another. 5. Determine the effect of swirling type flow and also sam- pling rate on the accuracy of S-type pitot tubes.
The pitot tube was invented by the French engineer Henri Pitot in the early 18th century and was modified to its modern form in the midth century by French scientist Henry Darcy. It is widely used to determine the airspeed of an aircraft, water speed of a boat, and to measure liquid, air and gas flow velocities in certain industrial. Pitot tube, Instrument for measuring the velocity (speed) of a flowing ed by Henri Pitot (–), it consists of a tube with a short, right-angled bend, which is placed vertically in a moving fluid with the mouth of the bent part directed upstream; the pressure, measured with an attached device, depends on the fluid flow and can be used to calculate the velocity.
Noting that z 1 ≅ z 2 since the static pressure holes of the Pitot-static probe are arranged circumferentially around the tube and V 1 0 because of the stag- nation conditions, the flow velocity V V 2 becomes Pitot formula: (8–67) which is known as the Pitot the velocity is measured at a loca-. The pitot tube can be made less sensitive to flow direction if the impact port has an internal bevel of about 15°, extending about diameters into the tube. If the pressure differential generated by the venturi is too low for accurate detection, the conventional pitot tube can be replaced by a pitot venturi or a double venturi sensor.
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UNIVERSITYOFILLINOIS June4, 19o6 THISISTOCERTIFYTHATTHETHESISPREPAREDUNDERMYSUPERVISIONBY LOUISSOLLIDAYKNORR ENTITLEDINVESTIGATIONOPEFFECTOPFORMOPORIFICEFORTHE.
Investigation of the effect of form of orifices for the Pitot tube. By Louis Solliday Knorr. Get PDF (2 MB) Abstract. Thesis (B.S.)--University of Illinois, Ms Topics: Pitot tubes Author: Louis Solliday Knorr. Enter the password to open this PDF file: Cancel OK.
File name:. Investigation of the effect of form of orifices for the Pitot tube / By Louis Solliday. Knorr. Abstract. (B.S.)--University of Illinois, Mode of access: Internet Topics: Theses, Pitot tubes. Year: OAI identifier: oai Author: Louis Solliday. Knorr. S-Type Pitot tube Large pressure orifices(Φ=5~10mm) & Strong tubes for high dust environments like industry stack (ISOKS M, EPA method2) ρ.
P V C P. S ∆ = 2, V: flow velocity in the stack gas(m/s) C. P,S: S type Pitot tube coefficient. ΔP: differential pressure between. impact and wake orifice (Pa) ρ: density of the stack.
Cite this chapter as: Widden M. () Flow measurement: pitot tube, venturi meter and orifice meter. In: Fluid Mechanics. Foundations of Engineering Series. Pitot-tube • Orifice meter: is a device used for measuring the velocity of flow at any point in a pipe or a channel.
• Principle: If the velocity at any point decreases, the pressure at that point increases due to the conservation of the kinetic energy into pressure energy.
emergence of the “multi-port averaging pitot tube.” As with the orifice plate and other head-type primaries, this refined version of the basic pitot tube is based on Bernoulli’s Theorem. The multi-port APT provides an extension and enhancement of proven concepts that offers many benefits.
The multi-port APT is a simple design. size change or inspection as orifice plates. (c) Pitot Tubes - A Pitot or impact tube makes use of the difference between the static and kinetic pressures at a single point. A similar device which is in effect a multiple pitot tube, averages the flow profile.
(d) Turbine Meters. FM - Flow Measurement by Venturi and Orifice meter Objectives: 1. To find the coefficient of discharge for venturi meter.
To find the coefficient of discharge for orifice meter. Theory: Venturi meter and orifice meter are the commonly used flow meters for measuring mass/volumetric flow rate or velocity of the flowing fluid. The orifice meter is a device (cheaper than venturimeter) used for measuring the discharge of the liquid flowing through a pipe.
It works on the same principle as that of venturimeter. The pitot tube is a small open tube bent at right angle. It is used to measure the velocity of flow at the required point in a pipe. It is determined by measuring the rise of liquid in a tube.
The effect of sharp edge orifice, with various diameters on discharge characteristics has been studied experimentally for a wide range of steam state. The inlet steam pressure was varied. The same investigation was repeated for three types of overbandage labyrinth sealing with different construction.
The results show that the critical discharge coefficient increased with the decrease of superheated steam temperature and with the increase of steam wetness fraction. The purpose of this study was to examine the effect of the cold end orifice diameter on the overall energy separation of the vortex tube.
Different generators with varying cold-end orifices were manufactured in the lab (see Table 1 and Fig. 2), and tests were conducted using a commercially manufactured vortex tube (Exair Corp., Model No.
maximum mass flow rate 5 kg/min at. February - Page 4 Fudaentas of Orifice eter easurement a multi-point pitot tube that averages the flow profile. Turbine Meters A turbine meter has a primary element that is kept in rotation by the linear velocity of the flow in which it is immersed.
The number of revolutions the device makes is proportional to the actual volume of flow. The influence of the Pitot tube diameter on the accuracy of supersonic core length determining is considered. The effect of the nozzle edge roughness on the supersonic core length is examined.
View. The above instruments were calibrated prior to use and all are traceable to national standards. Orifice plates Orifice plates of three diameter ratios were chosen for this investigation, vizandtypical of those in regular use. Thus the nominal orifice bores wereand mm respectively.
measured in a Pitot tube are not directly on the same stream line. It must therefore be an assumed that the static pressure measured at the side ports of the L-type Pitot, or at the downstream orifice of the S-type Pitot, is representative of the static pressure of the stagnated flow line.
A simple model has been developed for the functional form of the correction for the displacement effect and all available data on square-nosed Pitot tubes used to arrive at a method of correcting. An orifice installed at the bottom of the tank assisted in creating the water jet required for the pipe leak and, a Pitot tube positioning system above the tank allowed for positioning of straight and L-type Pitot tubes in the granular bed, which were used to measure the leakage conditions within the bed.
Schematic diagrams of the Pitot/impact tubes to be studied here are presented in Fig. 1, Fig. 2, respectively, for the hemispherical nosepiece and the blunt-faced seen in Fig.
1, the simulation model encompassed only the front portion of the Pitot/impact axial length of the investigated model was demonstrated by supplementary calculations to be long enough so that the.
from book Orifice Plates and meters operating on the basis of pressure (Venturi, Pitot tube, orifice plate Results of an experimental investigation into the effects of this pipe roughtness.The Pitot tube, as shown in the figure, can be used to measure the stagnation pressure. Stagnation pressure is the pressure when the flow has a stagnation velocity (i.e., V = 0).