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For the centrifugal water pump of Prob. 14-29, plot the pump's performance data: H (m), bhp (W), and (percent) as functions of
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Fluid Mechanics: Fundamentals and Applications
- LR = 5m, LG = 2.5m and LC = 1.1m Q2. The Skylark family of sounding rockets consisted of a number of variants (denoted Skylark 5, Skylark 7, and Skylark 12 respectively). These are illustrated on Page 3. The data given below is based on that for the rocket motors they used (all manufactured and named by what was Royal Ordinance – now part of Roxel): Raven XI Motor Total mass: 1280 kg Length = LR See Case Table (units are m) Diameter = 0.44 m Goldfinch IIA Motor Total mass: 420 kg Length = LG See Case Table (units are m) Diameter = 0.44 m Cuckoo IV Motor Total mass: 242 kg Length = LC See Case Table (units are m) Diameter = 0.44 m The payload mass which is additional to the motor masses is to be taken as 100 kg. (a) For the configurations of the three rockets shown on Page 3 in Fig. Q2: (i) Determine the Pitching/Yawing moment of inertia of each rocket about the base of each rocket. (ii) Explain how you could then find the the Pitching/Yawing moment of inertia of each rocket about its…arrow_forwardQUESTION 3 You are asked to select a new centrifugal pump for the piping system shown below that will be used to deliver 0.0233 m³/s of hot (50 °C) water from the storage tank into the reactor. The entire piping system is constructed from 10 cm internal diameter, wrought iron pipe. A gate valve is located between the pump outlet and reactor inlet. The storage tank and reactor are both closed vessels but they are vented to maintain atmospheric pressure above the liquid level. A local equipment supplier sends you the performance curves for four different pumps that are labelled 'Pump A', 'Pump B', 'Pump C', and 'Pump D'- the curves are shown on pages 7 & 8. Data: Water at 50 °C: Storage Tank density=988 kg/m³ viscosity = 0.000547 Pa's vapour pressure = 12.3 kPa 4 m ↓ 2 m ↑ L Reactor a. Calculate the available Net Positive Suction Head (NPSH). Note that previous experiments showed that the total head loss for the piping section between the storage tank and the pump, H has been determined…arrow_forwardFind 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.arrow_forward
- A wind turbine, 12 m in diameter, operates at sea level in a wind of 20 m/s. The wake or downstream velocity is measured as 8 m/s. Local air density is 1.2 kg/m. Estimate the thrust (in N) on the turbine. Enter your answer to the nearest whole number, Do not include units or +/- signs with your answer.arrow_forwardArgon enters a steady-state throttle valve ata pressure of 300kPaand a specific volume of 0.55m*/kg. What is the exit temperature if the exit pressure is 100kPa Report your answer using units of Kelvin and to three significant digits. Do not round numbers used in your computation. Only round the final numericanswer,arrow_forward(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.arrow_forward
- 'p' (liquid density) 'A' (tank cross sectional area) 'Qin' (Input Flow Rate) Qout' P Figure 1 'h' (head of liquid) 'R' (restriction coefficient) 5marrow_forwardAs a mechanical engineer, you can predict the performance of a new centrifugal pump using two methods which are One Dimensional Analysis (Velocity Triangle) and Hydraulic Scaling. Describe the limitation of each method.arrow_forwardData has been gathered from a lifting system used to transport engine parts. The system consists of a drum and cable. The following data was obtained when the drum lowers the load (assume constant acceleration). Drum diameter = 0.8m Mass of load = 3kg Initial velocitv = 0 m/s Time to descend = A secs 2. ( Distance travelled = 0.25m You have been asked to use this information to determine with 4 s.f. accuracy: Drum Cable a) The final linear velocity of the load b) The linear acceleration of the load Load c) The final angular velocity of the drum d) The angular acceleration of the drum e) The tension force in the cable f) The torque applied to the drum In determining the above quantities, you should clearly state the formulae used and apply dimensional analysis techniques to show that all values/units used are homogeneous.arrow_forward
- 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.arrow_forwardSolve the following application problem: The model s(t) = -16?2 + 5? + 3 describes the height(in feet) of a diver at time ? is measured in seconds. Find the velocity of the diver when the diver hits the water.arrow_forwardG1/ in the Pipe (A) is equal (PA= 25 Lit15), the diameter is equal ( DA - 75mm, Do = Fig.shown, the Flow rate in 6o mm, Dg = Dc%=30 mm), and the velocit Pipe (D) is equal (U0=5m/s), the relation between flow rate in Pipe (B) and pipe (c) %3D Find the Value af . 2- Un, UB, Uc. water Os = 30 mm input A QA - 25 Lit/sec = 75 mm fo mm %3D Inpud = A outPut = B,C,D accumule tion =o.arrow_forward
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