Fundamentals of Aerodynamics
6th Edition
ISBN: 9781259129919
Author: John D. Anderson Jr.
Publisher: McGraw-Hill Education
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Chapter 19, Problem 19.5P
Repeat Problem 19.4 for the case of all turbulent flow.
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Example 1:
A pipe 1 m diameter and 15 km long transmits water of velocity of 1 m/sec.
The friction coefficient of pipe is 0.005.
Calculate the head loss due to friction?
State three characteristics of turbulent?
1. A flow rate 450 L/s (water at 20°C) is carried in a 50-cm-diameter pipeline (ductile
iron new) for a distance of 1.5 km. Compute the friction head loss from (a) the Hazen-
Williams, and (b) Manning Equations.
Chapter 19 Solutions
Fundamentals of Aerodynamics
Ch. 19 - The wing on a Piper Cherokee general aviation...Ch. 19 - For the case in Problem 19.1, calculate the...Ch. 19 - For the case in Problem 19.1, calculate the...Ch. 19 - Consider Mach 4 flow at standard sea level...Ch. 19 - Repeat Problem 19.4 for the case of all turbulent...Ch. 19 - Prob. 19.6PCh. 19 - Prob. 19.7P
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- Water at room temperature with a mass flow rate of 2 kg / s flows through a system of 2 pipes connected in series. The first piece of pipe is 10 m long 1 in. Sch. 40, the second piece of pipe is 15 m long 2 in. Sch 40 is made of commercial steel tubing. Piping system is horizontal. Calculate the pressure loss across both pipes and the pump power required to flow water through this piping system, ignoring the energy loss of the fitting. CREATE THE KNOWN AND UNKNOWN BY DRAWING THE SHAPE OF THE ORGANIZATION AND WRITE YOUR ASSUMPTIONS IN DETAILarrow_forwardFrictional Pressure Drop in Flow of Olive Oil. Problem:Calculate the frictional pressure drop in pascal for olive oil at 293 K flowing through a commercial pipe having an inside diameter of 0.0525m and a length of 76.2m. The velocity of the fluid is 1.22m/s. Use the friction factor method. Is the flow laminar or turbulent?arrow_forwardIt requires a specific displacement before the flow become fully developed. Entry length a. depends only on diameter of pipe for turbulent flowb. depends on Reynolds number and diameter for turbulent flowc. and diameter ratio varies in turbulent flowd. All of thesearrow_forward
- 8.20 For a turbulent flow of a fluid in 0.6 m diameter pipe, the velocity 0.15 m from the wall is 2.7 m/s. Estimate the wall shear stress using the 1/7th expression for the velocity profile.arrow_forward1. A research experiment requires a laminar flow of water at 20°C through a 120mm diameterpipe at a Reynolds number of 1992.A. What is the average velocity?B. What maximum velocity is to be expected?C. What would be the pressure drop over a 11m horizontal length of developed flow? Useρ= 1000 kg/m3and v=1x10-6m2/s.D. How long would the entrance region be?arrow_forwardProblem 3: Momentum Balance For the dental device shown in Problem 1 the inlet pressure is 48 psig. The velocity ana dimensions are the same as in Problem 1. 2.0 1.6 NH,HCO3 NaHCO, 1.2 0.8 0.4 0.0 0.0 0.5 1.0 1.5 2.0 2.5 Concentration, moll 1 Stoke (St) = 1 Poise (P) divided by density of the fluid in g/cm³ A. What is the force require to hold the dental device, such that it does not move (steady)? Provide in boxes the force with direction first, then magnitude. B. How does this force needed to hold the dental device steady compare to the strength of the average human hand? 4 Viscosity, cStarrow_forward
- 1) Atmospheric air at 25oC and with a speed of 50 m/s is pumped by a fan over a flat plate. a)What is the minimum plate length in order to achieve a Reynolds number of 108 ? b)At what distance from the leading edge would transition occur if critical Re #= 5x105 ? 2) Local Nusselt number is given as Nux=0.04Rex0.9 Pr 1/3. Obtain an expression for, a) average heat transfer coefficient, x b) local heat transfer coefficient, hx c) What is the ratio of the average to local coefficient, x / hx 3) Air is in parallel flow over a flat heater surface which is to be maintained at 140oC. Airflow induces a drag force of 0.25 N on the heater. What is the electrical power needed to maintain the prescribed surface temperature? 4) Air at 1 atm with a velocity of 4 m/s and a temperature of 50oC flows over a flat plate that is at a uniform temperature of 100oC. The plate has a length of 0.20 m and a width of 0.1 m. a) What is the average heat…arrow_forwardCalculate the pressure drop expected when moving 30,000 efm of standard air through 250 feet of 30-in. diameter circular duct with three 90° elbows and two 45o elbows.arrow_forwardA local ventilation system (a hood and duct system) is used to remove air and contaminants from a pharmaceutical lab (Fig. 1). The inner diameter (ID) of the duct is 129 mm, its average roughness is 0.15 mm, and its total length is L = 24.5 m. There are three elbows along the duct, each with a minor loss coefficient of 0.21. Literature from the hood manufacturer lists the hood entry loss coefficient as 3.3 based on duct velocity. When the damper is fully open, its loss coefficient is 1.8. The minor loss coefficient through the 90° tee is 0.36. Finally, a one-way valve is installed to prevent contaminants from a second hood from flowing “backward” into the room. The minor loss coefficient of the (open) one-way valve is 6.6. The performance data of the fan fit a parabolic curve of the form Havailable = H0 - aV2, where shutoff head H0 = 60.0 mm of water column, coefficient a = 2.50 x 10-7 mm of water column per (Lpm)2 ,available head Havailable is in units of mm of water column, and…arrow_forward
- In the design of a 500m long water pipeline it is proposed to keep head loss, hf, less than 6m for a flow of 0.50 m's1. The pipeline must also be able to withstand water hammer pressures under rapid valve closure condition at the discharge end. Two types of pipes- PVC and steel - each 50 cm in diameter are available. Which pipe will you recommend? 1. The Darcy friction coefficient, 2, can be estimated from Figure 1. The value of the roughness height for steel pipe is 0.00015m, while the PVC pipe can be considered hydraulically smooth. The thickness of each pipe is 1 cm and the Modulus of Elasticity, E, for steel is 200x10° Nm2 and for PVC is 1.7×10®N%?. The Bulk Modulus of Elasticity, K, for water is 2x10°Nm2. The working pressures for the steel and PVC pipes are 2 MPa and 1 MPa respectively. 0,1 0,09|Laminar flow f IN aica Transition 0,08 Laminar Critica! flow Complete turbulence, rough pipes Zone 20ne 0,05 0.07 0,04 0,06 0,03 0,05 0,02 0,015 Lio 0,04 0,01 0.008 Re, 0,006 0,03 0,004…arrow_forwardPUMP SYSTEM – SYSTEM CURVE AND NPSH The pumping system shown below consists of a suction pipe of length 3m and diameter 80mm; delivery pipe of length 6m and diameter 80mm; 4 elbows, each with a loss coefficient of k = 0.3; total static lift = 6m; tank entry and exit loss coefficients 0.5 and 1.0, respectively; suction and delivery pipe friction factor f = 0.007Darcy. A Robuschi 150-500 pump rotates at 1470 rpm and the desired flow rate is a minimum of 200 m3/h. SUCTION PIPE Complete the following tasks: 1. Draw the system curve as described above on the Roubuschi pump curve data sheet supplied. Work in increments of Q 50m3/h starting at 0 (7-point curve) 2. Would you advise the client to select the p400 or ¢460 impeller? Give two reasons for your answer. If the 400 impeller is used: Assume: the gauge pressure in the suction tank at 115 kPa, the vapour pressure of the water at its average operating temperature at 20C suction height as 1.5 m. 3. Is the pump likely to cavitate? Support…arrow_forwardA is 2000 m gas flow line (6-in) and B is 2500 m liquid flow line (4-in) should be connected both with C is 2000 m pipeline (8-in) as shown below. If pipes roughness-0.046 mm, C-pipeline outlet pressure= 2000 kPa, liquid flow rate 9 x10 * m'/s, Gas Oil Ratio-80, p.= 863.2 kg/m', P-0.922 kg/m', gas flowing temperature 300 K, base temperature = 288.5 K, base pressure 101.325 kPa, Z-0.9, gas gravity is 0.6, gas viscosity=2.48 x10' cp and liquid viscosity =12.43 cp, calculate the inlet pressure for both liquid and gas flow lines? Aarrow_forward
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