Calculate the ratio of the turbulent h to the laminar

Assignment Help Mechanical Engineering
Reference no: EM13702496

Water at 24 degree C flows at 0.8 m/s in a smooth, 1.5 cm I.D. tube that is kept at 27 degree C. The system is extremely clean and quiet, and the flow stays laminar until a noisy air compressor is turned on in the laboratory. Then it suddenly goes turbulent. Calculate the ratio of the turbulent h to the laminar h. [hturb = 4429 W/m2K.]

Reference no: EM13702496

Questions Cloud

Dsm options and techniques : Analyse the months and times of peak and off-peak energy use. Using some of the DSM options and techniques discussed in this week, provide a proposal for the management of peak and off-peak energy consumption for existing rooms in a 1980s concrete..
Calculate the pressure at this point on the wing : A Boeing 747 is flying at M = 0.7 at an altitude where the temperature is 223.15 K. The density is 0.41268 kg/m3, and the pressure is 26429.7 Pa. The pressure coefficient on a point of the wing is -2. a) Calculate V0. b) Calculate the pressure (in Pa..
Which are denominated in dollars : Home's currency is the peso and trades at 1 peso per dollar. Home has external assets of $200 billion, all of which are denominated in dollars. It has external liabilities of $400 billion, 75% of which are denominated in dollars.
First tubes and on the tubes deep in teh array : Air at 20C flows over a very large bank of 2 cm OD tubes that are kept at 100C. the air approaces at an angle of 15 degress off normal to the tubes. the tube array is staggered, with SL= 3.5 CM and ST= 2.8 cm. Find Average h on the first tubes and on..
Calculate the ratio of the turbulent h to the laminar : Water at 24 degree C flows at 0.8 m/s in a smooth, 1.5 cm I.D. tube that is kept at 27 degree C. The system is extremely clean and quiet, and the flow stays laminar until a noisy air compressor is turned on in the laboratory. Then it suddenly goes tu..
Two copper slabs problem : Two copper slabs, 3cm thick and insulated on the outside are suddenly clamped tightly together. The one on the left side is initially at 100 C and the one on the right side at 0c. Determine the left-hand adiabatic boundary's temperature after 2.3s ha..
Steam condenses-what is the mass rate of condensation : Steam condenses in a 2cm I.D. thin walled tube of 99% aluminium at 10atm pressure. There are circular fins of constant thickness, 3.5cm in diameter, and every 0.5 cm on the outside. The fins are 0.8mm thick and the heat transfer coefficient from them..
Maximum shear stress developed in the shaft : The 60-mm diameter shaft rotates at 300 rev/min. this motion is caused by the unequal belt tensions on the pully of 800 N and 450 N. Determine the power transmitted and the maximum shear stress developed in the shaft.
An ideal diesel cycle has a compression ratio : An ideal diesel cycle has a compression ratio of 16.8 and a cut off ratio of 1.63. Determine the maximum air temperature and the rate of heat addition to this cycle when it produces 197 hp of power, the cycle is repeated 1,250 times per minute, and t..

Reviews

Write a Review

Mechanical Engineering Questions & Answers

  Two lb of water vapor in a piston cylinder assembly is

two lb of water vapor in a piston cylinder assembly is compressed at a constant pressure of of 250 lbfin2 from a volume

  Force required to keep the cart moving at constant velocity

A 2 cm horizontal jet of water with a velocity of 15 m/s is spraying onto a vertical plate attached to a cart moving opposite the direction of the water jet at 8 m/s. Determine the force required to keep the cart moving at a constant velocity.

  Consider 20 kg of a 996 wt fe-04 wt c alloy that is cooled

consider 2.0 kg of a 99.6 wt fe-0.4 wt c alloy that is cooled to a temperature just below the eutectoid. a how many

  Determine how much ice has melted to bring the temperature

(a) determine how much ice has melted to bring the temperature of the beverage to equilibrium with the ice/water. (b) Determine the final equilibrium temperature

  The mechanical errors in the joint and the inputoutput

the revolving joint type v of an industrial robot has a range of 240? rotation. the mechanical errors in the joint and

  Evaluate the reduction in pump bhp

Evaluate the reduction in pump BHP required by heating the oil from 50° F to 100° F. Suppose efficiency of 80% (HP)

  Two meshing helical gears have a 25 degree transverse

two meshing helical gears have a 25 degree transverse pressure angle and a 20 degree normal pressure angle. the gears

  A 45 wt pb-55 mg alloy is rapidly quenched to room

a 45 wt pb-55 mg alloy is rapidly quenched to room temperature from an elevated temperature in such a way that the high

  Determine the rate of heat loss at the compressor exit

refrigerant 134-a enters a compressor as a saturated vapor at 200 kpa at a rate of 0.04 m3s. the power input to the

  Determine the natural convection heat transfer coefficient

experiments have been conducted on a steel vertical flat plate 130 mm in width and 160 mm long. the plate is heated

  Calculate the angle between the wires

showing the two upward pulls of the rings on his hands, each of size 380N. Calculate the angle between the wires supporting the rings and the vertical.

  Where are hogr used in general

What is hogr? How much steam pressure is required to maintain adequate vacuum with it? Where are hogr used in general?

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd