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Anna71 [15]
3 years ago
12

At the inlet to the combustor of a supersonic combustion ramjet (or scramjet), the flow Mach number is supersonic. For a fuel-ai

r mass ratio of .03 and a combustor exit temperature of 4800 degr, calculate the inlet Mach number above which the flow will be unchoked. Assume one- dimensional frictionless flow with y = 1.4, with heat release per slug of fuel equal to 4.5 x 108 ft-lbf. (Anderson 3.11) The temperatures for the above combustion problems are pretty high. A more representative value of the heat capacity ratio for products of combustion at these temperatures is y = 1.28 The value of the specific gas constant R may still be approximated as equal to that of air. b) For problem #2, calculate the inlet Mach number above which the flow will be unchoked, based on y = 1.28

Engineering
1 answer:
Daniel [21]3 years ago
8 0

Answer:

The inlet match number is 3.42.

Explanation:

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The kinetic energy of A is twice the kinetic energy of B

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A body whose velocity is constant has a. positive acceleration b. negative acceleration g. zero acceleration d. all of the above
adoni [48]

Answer:

option (c) is the correct answer which is zero acceleration.

Explanation:

It is given in the question that the velocity is constant.

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the options are provided in relation to the acceleration.

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4 0
3 years ago
Write a script named dif.py. This script should prompt the user for the names of two text files and compare the contents of the
Ainat [17]

Answer:

1

Created on Nov 3, 2018 @author: ASLand

7import atexit

#Read, nanes of both files

Rrintll"Enter tvo files to be compared below

userliamel input ("Enter the nome of the first file: ")

userliame2 input("Enter the name of the second file: ")

ROpen each file

f1 - open(userNamel, r')

@17 f2 = opan(useriame 2, )

tread all the lines into a list

d1 f1.readlines ()

d2 f2.readlines()

re equivalent, print "Yes" else pri

oiterate, and conpare

#11

the

y

if dl == d2:

print("Yes")

atexit

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7 0
3 years ago
Steam enters a turbine from a 2 inch diameter pipe, at 600 psia, 930 F, with a velocity of 620 ft/s. It leaves the turbine at 12
Katarina [22]

Answer:

\dot W_{out} = 3374.289\,\frac{BTU}{s}

Explanation:

The model for the turbine is given by the First Law of Thermodynamics:

- \dot W_{out} + \dot m \cdot (h_{in} - h_{out}) = 0

The turbine power output is:

\dot W_{out} = \dot m\cdot (h_{in}-h_{out})

The volumetric flow is:

\dot V = \frac{\pi}{4} \cdot \left( \frac{2}{12}\,ft \right)^{2}\cdot (620\,\frac{ft}{s} )

\dot V \approx 13.526\,\frac{ft^{3}}{s}

The specific volume of steam at inlet is:

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The mass flow is:

\dot m = \frac{\dot V}{\nu}

\dot m = \frac{13.526\,\frac{ft^{3}}{s} }{1.33490\,\frac{ft^{3}}{lbm} }

\dot m = 10.133\,\frac{lbm}{s}

Specific enthalpies at inlet and outlet are, respectively:

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h = 1479.74\,\frac{BTU}{lbm}

State 2 (Saturated Vapor)

h = 1146.1\,\frac{BTU}{lbm}

The turbine power output is:

\dot W_{out} = (10.133\,\frac{lbm}{s} )\cdot (1479.1\,\frac{BTU}{lbm}-1146.1\,\frac{BTU}{lbm})

\dot W_{out} = 3374.289\,\frac{BTU}{s}

6 0
2 years ago
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