Question 4 It is required to design a squared, four stroke, twelve cylinder, and spark ignition engine to propel an airplane. The following data can be used to decide some of the engine parameters. The airplane Mach No 0.5 ambient conditions 0.54 bar, 255 K Thrust 5.5 KN The piston Engine Brake power 1000 kW bmep 10 bar Bsfc 0.26 (kg/hr)/kW f 0.05 Engine speed 3000 rpm Calculate 1. Propeller efficiency 2. Bore and stroke dimensions 3. Actual fuel and air consumption

Question 4 It is required to design a squared, four stroke, twelve cylinder, and spark ignition engine to propel an airplane. The following data can be used to decide some of the engine parameters. The airplane Mach No 0.5 ambient conditions 0.54 bar, 255 K Thrust 5.5 KN The piston Engine Brake power 1000 kW bmep 10 bar Bsfc 0.26 (kg/hr)/kW f 0.05 Engine speed 3000 rpm Calculate 1. Propeller efficiency 2. Bore and stroke dimensions 3. Actual fuel and air consumption

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

See similar textbooks

Similar questions

The following data were obtained during a test of six cylinder otto cycle engine. Speed 2000 rpm, bore 3.5 in stroke 3.75 in, specific fuel consumption base on brake hp.66 lbs. / bhp-hr, brake arm 1.05 ft. HHV of fuel 20000 Btu/lb, Brake Torque 133 ft-lb, friction torque 40 ft-lb room temperature 90 F. barometric pressure 14.7 psia Find:a.) BHP=b.) BMEP=c.) IMEP=d.) IHP=e.) BRAKE THERMAL EFFICIENCY=f.) INDICATED THERMAL EFFICIENCY=
A 4-cylinder, 4-stroke engine gave the following results when tested on a test bed and the following readings were obtained. • Shaft speed = 4500 rev/min • Fuel consumption = 2.5 g/s • Fuel Calorific Value = 44 MJ/kg • Indicative mean effective pressure = 650 kPa • Piston stroke = 120 mm • Piston bore = 100 mm, • Net Brake Load = 350 N • Torque arm = 0.40 m (Shaft Torque = Net Brake Load × Torque arm) Determine the: (a) Engine indicated power, (b) Brake power, (c) Brake thermal efficiency, (d) Friction power, and (e) Mechanical efficiency.
During a test on a five-cylinder four-stroke IC diesel engine with a cylinder bore and stroke length of 260 mm and 305 mm respectively, running at 503 r/min, the following results were obtained: Mass on Dynamometer mass hanger (arm length = 0.825 m) 221.9 kg Indicated mean effective pressure 400 kPa Fuel consumption (with Qnet,v = 39.8 MJ/kg, density = 0.944 kg/l) 6 ml/s Take acceleration due to gravity as 9.81 m per square seconds Calculate the brake power .
During a test on a 4-cylinder four-stroke IC diesel engine with a cylinder bore and stroke length of 268 mm and 312 mm respectively, running at 440 r/min, the following results were obtained: Mass on Dynamometer mass hanger (arm length = 0.829 m) 208.6 kg Indicated mean effective pressure 481 kPa Fuel consumption (with Qnet,v = 39.8 MJ/kg, density = 0.944 kg/l) 6 ml/s Take acceleration due to gravity as 9.81 m per square seconds Calculate the mechanical efficiency in 3 decimal places.
Energy balance results (in kW) obtained for the same medium speed single cylinder diesel engine are reported in the following table. The shaft power for case 2 is: Case N (rpm) bmep (bar) ėmhaer ambient zhaft 1 500 9.90 ? 7.1 2.2 4.2 19.1 60.3 500 3.52 24.5 6.1 3.6 5.2 ? 3 400 3.50 23.8 4.9 4.1 1.4 Select one: O a. 2.7 O b. 12.14 O c. 2.17 O d. 8.73 O e. 6.79
During a test on a 4-cylinder four-stroke IC diesel engine with a cylinder bore and stroke length of 317 mm and 307 mm respectively, running at 481 r/min, the following results were obtained: Mass on Dynamometer mass hanger (arm length = 0.825 m) 205 kg Indicated mean effective pressure 403 kPa Fuel consumption (with Qnet,v = 39.8 MJ/kg, density = 0.944 kg/l) 6 ml/s Take acceleration due to gravity as 9.81 m per square seconds Calculate the brake thermal efficiency in decimal form.
During a 60–minute trial of a single cylinder four-stroke oil engine, the following observations were made. Engine dimension = 0.3 m bore X 0.45 m stroke, Fuel consumption 11.4 kg, Calorific value of fuel = 40 MJ/kg, IMEP = 6 bar, Net load on brakes = 1652 N , Speed = 300 rpm, Brake drum diameter = 1.8 m, Brake rope diameter = 20 mm, Quantity of jacket cooling water = 600 kg, Temperature rise of cooling water = 55°C, Quantity of air as measured = 250 kg, Exhaust gas temperature = 420°C, Specific heat of exhaust gas = 1.0 kJ/kg K, Ambient temperature = 20°C. Draw up an energy balance sheet of the engine and calculate for: Qw = energy loss due to cooling water, in kJQe = energy loss due to exhaust gas, in kJQu = unaccounted energy loss due to convection, radiation, etc. , in kJ
Completely solve and box the final answers. Write legibly 4. A single stage air compressor handles 30 cubic meter per minute of atmospheric pressure, 30°C air and delivers it to a receiver at 3.0 mpa. Its volumetric efficiency is 83.0%, compression efficiency of 83.0% and mechanical efficiency of 80.30%. If it rotates at 300 rpm, what power in kW is required to drive it?
During testing of single cylinder two-stroke petrol engine following data were obtained. Brake torque = 640 Nm, cylinder diameter 21 cm, speed 350 rpm, stroke length = 28 cm, mean effective pressure = 5.6 bar, oil consumption = 8.16 kg/h, calorific value of the fuel = 42,705 kj/kg. Determine: Srake thermal efficiency
The following data relate to a performance test of a single acting reciprocating air compressor. Bore = 14 cm Stroke = 10 cm Suction pressure = 1.3 bar Suction temperature = 32°C Discharge pressure = 6 bar Discharge temperature = 180°C Speed of the compressor = 1200 rpm Shaft power = 6.25 kW Mass of air delivered = 1.7 kg/min Polytropic index = 1.25 Calculate the following: (i) Volumetric efficiency (ii) Indicated power (iii) Mechanical efficiency
Qsafe = 187.586 MJ
During a test on a five-cylinder four-stroke IC diesel engine with a cylinder bore and stroke length of 260 mm and 305 mm respectively, running at 500 r/min, the following results were obtained: Mass on Dynamometer mass hanger (arm length = 825 mm) 205 kg Indicated mean effective pressure 400 kPa Fuel consumption (with Qnet,v = 39.8 MJ/kg, density = 0.944 kg/l) 6.1 ml/s Calculate the energy supplied by the fuel (kW),