Q5) The average velocity of the air flowing in a pipe with a roughness of ks=D0.0015 mm with a diameter of 4 mm at standard pressure and temperature is V=50ms1. Under these conditions, the flow is normally turbulent. However, laminar flow conditions can be provided if some necessary conditions are met (if the entrance to the tube is softened, there are no dust particles in the air, etc.). According to this; a) What is the pressure drop in the 0.1 m section of the pipe? b) Repeat the same question for the condition that the flow is turbulent. (pair=1.23 N.s?m²; uair=1. 79 x 10-5 N.s.m2)

Q5) The average velocity of the air flowing in a pipe with a roughness of ks=D0.0015 mm with a diameter of 4 mm at standard pressure and temperature is V=50ms1. Under these conditions, the flow is normally turbulent. However, laminar flow conditions can be provided if some necessary conditions are met (if the entrance to the tube is softened, there are no dust particles in the air, etc.). According to this; a) What is the pressure drop in the 0.1 m section of the pipe? b) Repeat the same question for the condition that the flow is turbulent. (pair=1.23 N.s?m²; uair=1. 79 x 10-5 N.s.m2)

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

See similar textbooks

Similar questions

C2. A conical tube is fixed vertically with its smaller end upwards and it forms a part of the pipeline. The diameter at the smaller end is 245 mm and at the larger end is 467 mm. The length of the conical tube is 1.8 m and the flow rate of the oil is 128 liters/s. The pressure at the smaller end is equivalent to a head of 9.7 m of oil. Considering the following two cases: (1) Neglecting friction, (without head loss) determine (i) the velocity at the smaller end in m/s, (ii) the velocity at the larger end in m/s, and (iii) the pressure at the larger end of the tube. (2) If a head loss (with head loss) in the tube is hL= 0.0153(V1-V2)2, where V1 is the velocity at the smaller end and V2 is the velocity at the larger end, determine (iv) the head loss in m of oil and (v) the pressure at the larger end of the tube.
After analyzing the flow type in a refinery oil (s = 0.8, v= 1.94x10-4 ft2/s) flowing through a 9inch diameter pipe at (41/1000) ft3/s. Find the following a)centerline velocity b)the velocity at r = 2inch c)the frictional factor d)the shear stress at the pipe wall and e)the head loss per foot of pipe length.
A pipe carrying oil of specific gravity 0.877 changes in size from 150 mm at section 1 and 450mm at section 2. Section 1 is 3.6 m below section 2 and the pressures are 90 KPa and 60 KPa, respectively If the discharge is 150 lit/sec, determine the head lost and the direction of flow.
A pipe carrying oil of specific gravity 0.877 changes in size from 150 mm at section 1 and 450 mm at section 2. Section 1 is 3.6 m below section 2 and the pressures are 90 KPa and 60 KPa, respectively. If the discharge is 150 lit/sec, determine the head lost and the direction of flow.
A venturi meter is introduced in a 300 mm diameter horizontal pipeline carrying a liquid under a pressure of 150 kPa. The throat diameter of the me- ter is 100 mm and the pressure at the throat is 400 mm of mercury below atmosphere. If 3% of the differential pressure is lost between inlet and the throat, determine the flow rate of the pipeline. PLEASE USE BERNOULLI'S ENERGY EQUATION. INCLUDE COMPLETE SOLUTION
Water flows through a garden hose at a rate of 1 l/s. The upstream diameter of the hose is 2.5 cm, and the nozzle outlet has a diameter of 1 cm. Determine the upstream pressure (gage pressure).
1 - If the pipeline is now specified to be of Schedule 40 with a nominal diameter of 6 in., and the available pressure at the pump exit is P2 = 132.7 psig, what flow rate Q (gpm) can be expected? Answer the following additional questions: 2 -If the combination of pump and motor is 80% efficient, how much electrical power (kW) is needed to drive the pump? 3 -, in order to avoid vapour lock, the pressure in the pipeline must always be above the vapor pressure of the crude oil, what is the maximum permissible elevation of point 3 relative to point 4? 4 -If the flow in the pipeline were at the upper limit of being laminar, what pump exit pressure would then be needed? (Answer this part without using the friction factor plot.
Water flows upwards in a vertical pipeline of gradually varying section from point 1 to point 2, which is 1.5m above point 1, at the rate of 0.9m^3/s. At section 1 the pipe diameter is 0.5m and pressure is 800 kPa. If pressure at section 2 is 600 kPa, determine the pipe diameter at that location. Neglect losses. UNKNOWN: DIAMETER OF THE PIPE STRICTLY SHOW COMPLETE FBD AND SOLUTION MUST BE HANDWRITTEN
Water flows at the rate of 0.80m3/s in a 900-m long pipe. The total head loss in the pipe is 4m. Which of the following most nearly gives the diameter of the pipe using the Darcy-Weisbach formula with f = 0.018?
Water at 20°C (?=998.3kg/m3 ??? v =1×10−6?2/?) flows through a galvanised iron pipe (? = 0.15 ??) with a diameter of 20 mm, entering the room at point A and discharging at point C from the fully opened gate valve B at a volumetric flow rate of 0.003 m3/s. Determine the required pressure at A, considering all the losses that occur in the system described in Figure Q1. Loss coefficients for pipe fittings have been provided in Table 1. L1 = 4 L2 = 1 L3 = 2.66 L4 = 1.34 L5 = 0.5 L6 = 1 Table of Loss Coeffcients Loss Coeffcients KL Gate Valve - Fully Open 0.19 90° Bend 0.9 45° Bend 0.4 Tee for Valve along Branch 1.8
Oil (SG oil = 0.95) flows at 200 L/s through a 200mm diameter pipe, 500m long. Friction factor is 0.0225. Determine a) the head loss and b) the pressure difference between the endpoints of the pipe if the pipe slopes down at 10 degrees from the horizontal in the direction of flow (starting point is higher than the end point).
04: Three pipes of diameters 300 mm, 200 mm and 400 mm and lengths 450 m, 255 m and 315 m, respectively, are connected in series. The difference in water surface levels in two tanks is 18 m. Determine the rate of water flow if coefficients of friction are 0.0075, 0.0078 and 0.0072, respectively, considering: (a) with minor losses, (b) without (neglecting) ‘minor losses.