16.36 The air flow to a four-cylinder four-stroke gasoline engine was measuredby means of a 8 cm diameter sharp edged orifice with Ca = 0.65. Duringa test the following data were recorded:Bore = 10 cm= 15 cm= 2500 rpm36 kWStrokeEngine speedBrake powerFuel consumptionCalorific value of fuelPressure drop across the orifice = 4 cm of water%3D10 kg/h42 MJ/kg%3D%3DAtmospheric temperature and pressure are 17 °C and 1 bar respectively.Calculate(i) brake thermal efficiency(ii) brake mean effective pressure(iii) volumetric efficiency based on free air condition

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Answered: ake (iii) uoluumatui ffinionou (:::)

Engineering

Mechanical Engineering

ake (iii) uoluumatui ffinionou (:::)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

16.36 The air flow to a four-cylinder four-stroke gasoline engine was measured
by means of a 8 cm diameter sharp edged orifice with Ca = 0.65. During
a test the following data were recorded:
Bore = 10 cm
= 15 cm
= 2500 rpm
36 kW
Stroke
Engine speed
Brake power
Fuel consumption
Calorific value of fuel
Pressure drop across the orifice = 4 cm of water
%3D
10 kg/h
42 MJ/kg
%3D
%3D
Atmospheric temperature and pressure are 17 °C and 1 bar respectively.
Calculate
(i) brake thermal efficiency
(ii) brake mean effective pressure
(iii) volumetric efficiency based on free air condition

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