10, The approximate number of experiments to evaluate the influence of 5 parameters separately is- , assuming that 10 experiments are needed for each variable. 11. If stream lines are similar between model and prototype, it is called ---- 12. For flow around immersed bodies, incompressible flow. 13. When wave resistance is important, 14.Total losses in pipe flow is composed of- losses and similarity. similarity is used in case of similarity is used. -- losses. ww-

10, The approximate number of experiments to evaluate the influence of 5 parameters separately is- , assuming that 10 experiments are needed for each variable. 11. If stream lines are similar between model and prototype, it is called ---- 12. For flow around immersed bodies, incompressible flow. 13. When wave resistance is important, 14.Total losses in pipe flow is composed of- losses and similarity. similarity is used in case of similarity is used. -- losses. ww-

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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(b) A pitot-static probe is use to determine the flow velocity by measuring the differential pressure. The pitot formula to obtain the flow velocity is, 2(P- P,) V = where, V is the velocity, P is pressure and pis fluid density. i) The pressure difference sensor use in the system is electronic types and the output of the device is measured in voltage. The output of the pressure device is 3.5 V and the linear relationship between the device and the pressure difference is 10 kPa/V. If the measured fluid is water at 20°C, determine the pressure difference inside the system the water velocity. ii) The Pitot-static tube is also commonly use in aircraft. An aircraft flying at 3000 m above sea level when the differential pressure reading clocked 3 kPa. Determine the speed of the aircraft.
Q// Upon completion of the Reynolds experiment, we had this information. The tube diameter was 0.03 m, time is 14 sec and the lamellar bisection type 'Find Q flow rate m^3/s , Re, viscosity and velocity m / s at a temperature of 26 ° C for water.
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At low velocities (laminar flow), the volume flow Q through a small-bore tube is a function only of the tube radius R, the fluid viscosity ?܇, and the pressure drop per unit tube length dp/dx. Using the Buckingham pi theorem, find an appropriate dimensionless relationship. Make use of Table 1
Find the pressure drop between locations a and b for flow in a pipe using the following data: Working fluid: Water Pipe: Stainless steel, Schedule No. 120 Nominal pipe size (cm): 10 Flow rate (m3 /min): 2.271 Temperature (C): 38 Length (m): 45.72 Solve for the following 3 cases: a) Za = Zb =33.5 m, b) Za = Zb + 15 m, and c) Za = Zb + 46 m.
Problem 5 19 The Weber number is a dimensionless parameter relating inertial and surface tension forces in a fluid flow. Consider a droplet of water where the Weber number is defined as: Calculate the Weber number We. pV?d We = Type your answer.. The following parameter values are measured and determined with 95% confidence: p = 1.000 + 0.008 cm3 V = 5.0 + 0.1 d = 1.000 + 0.025 mm (milimeters) m 20 o = 0.072 + 3% Calculate the absolute uncertainty in the Weber number Uwe Type your answer...
PROPAGATION OF ERROR You are tasked to supervise the design of 0.5MW wind turbine to be constructed in a Wind Farm in Pililla, Rizal. Suppose the design criteria are as follows: The air density as surveyed after 2 year period averaged at 1.225 kg / cubic meter. The sweeping diameter of the rotor blades is 125m, and the anemometer reading in the area amounts to 4.2m/s on a 2 year period of survey. if the diameter measurement is off by 0.1m and the anemometer reading is also fluctuating by 0.05m/s. In the design specifications given, if the actual measurement of power via the substation amounts to exactly 530kW and given that the windspeed is off by 0.05m/s, what could have been the error in the measurement of diameter? Your answer must be in 3 decimal places and in correct signs and measurement. Show complete solution in paper.
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In the field of air pollution control, one often needs to sample the quality of a moving airstream. In such measurements a sampling probe is aligned with the flow as sketched in Fig. A suction pump draws air through the probe at volume flow rate V· as sketched. For accurate sampling, the air speed through the probe should be the same as that of the airstream (isokinetic sampling). However, if the applied suction is too large, as sketched in Fig, the air speed through the probe is greater than that of the airstream (super iso kinetic sampling). For simplicity consider a two-dimensional case in which the sampling probe height is h = 4.58 mm and its width is W = 39.5 mm. The values of the stream function corresponding to the lower and upper dividing streamlines are ?l = 0.093 m2/s and ?u = 0.150 m2/s, respectively. Calculate the volume flow rate through the probe (in units of m3/s) and the average speed of the air sucked through the probe.
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17. The moment of viscous liquid bctween two cylinder depend on angular velocity o of internal cylinder, cylinders diameters d, D., absolute viscosity u. Find the dimensionless parameters and obtain the similarity of dimensionless parameters. M= f(d.D.