To avoid the bulky tower and impeller and generator inthe HAWT of the chapter-opener photo, we could insteadbuild a number of Darrieus turbines of height 4 m anddiameter 3 m. (a) How many of these would we need tomatch the HAWT’s 100 kW output for 15 m/s wind speedand maximum power? (b) How fast would they rotate?Assume the area swept out by a Darrieus turbine is twothirdsthe height times the diameter.

Q: Consider a location where the wind blows at 15 m/s. 2 options with two rows of turbines…

A: INTRODUCTION : The first row and second row of turbines are provided in this problem. During a…

Q: Read the question carefully and give me right solution according to the question.  The wind turbine…

A: Given, Diameter,d=60mVelocity, v=20m/sDensity at sea level, ρ=1.225kg/m3Total power developed by…

Q: Q2 (a) In designing a nozzle why nozzle angle is not zero. Explain with the help of sketch. Q2 (b)…

A: Nozzle :- Nozzle is an device which are used to increase the kinetic energy and convert in to heat.…

Q: An air tank of volume 1.5 m3 is initially at 800 kPa and20 °C. At t = 0, it begins exhausting…

A: Given data

Q: Consider the Gulfstream IV flying at Mach = 0.8 at an altitude with atmospheric pressure of…

A: Given data Mach number of aircraft = 0.8 Weight = 73000 lb S = 950 ft2 AR = 5.92 CD,0 = 0.015 K =…

Q: In Fig.  water exits from a nozzle into atmosphericthe pressure of 101 kPa. If the exit velocity is…

A: Given data Atmospheric pressure P0 = 101KPa Velocity of water at the exit of pipe V2 = 8 m/sec From…

Q: The blades of a large wind turbine, designed E generate electricity, sweep out an area 1400 m and…

A: Given that, Swept area, A=1400 m2,Speed of air, v=15 m/sec, (a) The mass flow rate through the wind…

Q: Example (2-1): A six stage centrifugal pump deliver 120 L/s against a net pressure rise of 51 kg/…

A:

Q: 6.7 A converging-diverging nozzle is designed to provide flow at Mach 2.0. With the nozzle…

A:

Q: The velocity of steam leaving the nozzles of an impulse turbine is 900 m/s and the nozzle angle is…

A: Given data as per question Exit velocity of stream =900 m/s Nozzle angle =200 Blade velocity =300…

Q: 54. Engine for an airplane (Fth = 30.6 kN, A, = 2.8 A2, p1 = 101.3 kPa, T1 = 12 °C, v1 = 105.4 m-s1,…

A: By using the momentum integral equation P1A1-P2A2-Fth=m˙v2-v1    ....(1) Now the mass flow rate is…

Q: Consider the Gulfstream IV flying at Mach = 0.8 at an altitude with atmospheric pressure of…

A: Given data Speed of aircraft = 0.8 Mach Altitude Pressure = 33283.40 Pa Weight = 73000 lb = 33112.24…

Q: In Fig. P3.137 the piston drives water at 20 ° C. Neglectinglosses, estimate the exit velocity V 2…

A: At 20 degree celcius Density of water is 0.036055 lb/in3 Pressure at section 1 = Patm + Pressure due…

Q: The orientation of a hole can make a difference. Considerholes A and B in Fig.  which are identical…

A: Write the relation between pressures at entry and exit points of hole B and the Mach number of hole…

Q: A proposed wind power plant in Batangas is designed to have a power generated output of 30 MW. A…

A: Write the given data in the problem.   P=30 MW  v=10 km/h Here, P is the power output of the plant,…

Q: It is desired to pump ethanol at 20°C through 115 m of straight smooth tubing under laminar-flow…

A:

Q: ||specific gravity = 0.8) at 3000 Pa flows at a constant rate of 1 m³/s through the circular What is…

A:

Q: In Fig.  water exits from a nozzle into atmosphericpressure of 101 kPa. If the fl ow rate is 160…

A: The flow rate of the water is From the continuity equation,

Q: PROBLEM: A radial flow reaction turbine has the following characteristics: Circumferential area at…

A: according to the given data

Q: s 50 kg. Determine the anchoring force needed to hold the elbow in place. Take the momentum-flux…

A: The angle of deflection is: θ=45ο The mass flow rate of water is: mο=30 kg/s The area of the elbow…

Q: Water fl ows steadily through the box in Fig. P3.63. Averagevelocity at all ports is 7 m/s. The…

A: Given Data: The velocity at port 1 is V1 = 7 m/s. The velocity at port 2 is V2 = 7 m/s. The…

Q: A jet impinges on a splitter block. The incoming jet is horizontal and has a flow rate of Q1 = 8000…

A: Given data Q1 = 8000 cm3/s = 0.008 m3/sA1 = 40 cm2 = 0.004 m2Q2 =  6000 cm3/s = 0.006 m3/sA2 = 30cm2…

Q: 3.15) An axial flow compressor stage has blade mean velocity of 200 m/s. The stage is to be designed…

A:

Q: A boat of mass 2500 kg has two hydrofoils, each of chord30 cm and span 1.5 m, with CL,max = 1.2 and…

A:

Q: Differentiate between impulse and reaction turbines?

A: To find : Differentiate between impulse and reaction turbines

Q: 1. Calculate the volumetricflow rate of the siphon (cm³/s), assuming that L= 100cm, Az = 80 cm, and…

A: Siphon: It is a pipe or tube that is used to transfer a fluid in fluid mechanics. It can be to…

Q: Q4. ajExplane the magnus effect in the potential fow b) A cylinder woith 50 cm in length, is under…

A:

Q: If there are no shock waves and the pressure at one ductsection in Fig.  is 55.5 kPa, what is the…

A: given data as per the question The temperature of tank =400 k The pressure of tank =300 Kpa…

Q: Discuss the meaning of reverse swirl in reaction hydroturbines, and explain why some reverse swirl…

A: Reverse swirl is when the runner blades turn the flow so much that the swirl at the runner outlet is…

Q: 27. Engine of an airplane (v, = 102.5 m-s, v2 = 792 m-s", Fn = 31.8 kN, A, = 2.88 A2, pi = 1.26 p2,…

A:

Q: A Pelton turbine with a 1.75 m impeller radius has a nozzle with a mouth diameter of 12 cm. Since…

A:

Q: setup a Bernoulli's equation in head form that can be used to determine the pump power requirement.…

A:

Q: Water (density 1000=kg/m3) enters radially through a centrifugal pump whose impeller diameter has a…

A:

Q: A radial flow reaction turbine has the following characteristics: Circumferential area at entrance…

A: The turbine in which the total head available at the entry is partly converted into kinetic energy…

Q: A wind turbine located at a height of 25m from ground, produces 950 kW. Its hub diameter negligible…

A: Assumption 1) Density of Air is 1.25 kg/m3 2) Rotation of the wheel is the same as that of the…

Q: Two water tanks, each with base area of 1 ft2, are connectedby a 0.5-in-diameter long-radius nozzle…

A: For water at 20oC, take density as  1.94 slug/ft3 and viscosity   2.09x10-5 slug/ft.s. For a…

Q: Air flows isentropically through a variable-area duct. Atsection 1, A1= 20 cm2, p1= 300 kPa, ρ1=…

A: If the areas are the same but the velocities are different, there must be a sonic throat in between:…

Q: Consider two identical wind turbines with a hub height of 40 m, one located in flat agricultural…

A: Height =40m The velocity of wind is 10 m/s at a height of 100 m. To find Pagricultural/Pforest

Q: Air, assumed frictionless, fl ows through a tube, exiting tosea-level atmosphere. Diameters at 1 and…

A: Given The diameter at section 1 and 3 is D=5 cm. The diameter at section 2 is D2=3 cm. The height…

Q: The air-cushion vehicle in Fig.  brings in sea-levelstandard air through a fan and discharges it at…

A: At section1 V=0 (For air) Po1-Patm=WArea=50,000π(3)2=12ρV2exit=12(1.205)Vexit2=1768 Pa Vexit=54.2…

Q: A radial flow reaction turbine has the following characteristics: Circumferential area at entrance…

A:

Q: What is the relationship between the average power in the wind and average speed?  A horizontal-axis…

A:

Q: Air at Ma1 = 2.0 and p1 = 100 kPa undergoes an isentropicexpansion to a downstream pressure of 50…

A: GivenMach no. before the turn, Ma1=2 Pressure before the turn, p1=100 kPa Pressure before the turn,…

Q: Example: In a 45° bend a rectangular air duct of 1 m² cross-sectional area is gradually reduced to…

A:

Applied Fluid Mechanics

A fluid is a substance that is continuously deformed by the application of shear stress. The rate of deformation of a fluid depends on its viscosity. The fluid tries to flow when it interacts with some other system.