Q1. An SI engine operating at 1200 rpm has a 10.2 cm bore with the spark plug offset by 6 mm from center. The spark plug is fired at 20° BTDC. It takes 6.5° of engine rotation for combustion to develop and get into flame propagation mode, where the average flame speed is 15.8 m/s. Calculate: 1. Time of one combustion process (i.e. time for flame front to reach the furthest cylinder wall)? 2. Crank angle position at the end of combustion?

Q1. An SI engine operating at 1200 rpm has a 10.2 cm bore with the spark plug offset by 6 mm from center. The spark plug is fired at 20° BTDC. It takes 6.5° of engine rotation for combustion to develop and get into flame propagation mode, where the average flame speed is 15.8 m/s. Calculate: 1. Time of one combustion process (i.e. time for flame front to reach the furthest cylinder wall)? 2. Crank angle position at the end of combustion?

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter39: Residential Energy Auditing

Section: Chapter Questions

Problem 15RQ: When performing a combustion efficiency test, digital flue gas will measure what four...

See similar textbooks

Similar questions

Describe what is done in the combustion process in the combustion chamber of a gas turbine to overcome the problem of a very low laminar flame speed compared to aircraft speed and a limited flame limit range? Explain with long expalanation max in 2 hours thank u
Either for gas turbines OR for internal combustion engines, for the sustainable renewable energy future of Mauritius, explain which fuel(s) can be used and explain the combustion process with the help of relevant equations and diagrams. Show clearly how sustainability is achieved through the proper thermal engineering processes. Only few information provided in the images.
suppose that the inner cone of flame produces 430 btu per cubic foot of gas, and the outter envelope produces 610 btu per cubic foot of gas what is the total heat produced by the flame
A Three stage
For a period of 0.2 hour of test, 620 grams of fuel with density of 875.4 Kg/m^3 at 37.5 degree-C are completely burned with air at air-fuel ratio of 14 Kg of air per one Kg of diesel fuel. The compression ratio is 14. Using a brake torque analysis, the dynamometer reads a scale of 85 Kg with 35 cm arm at 440 rpm. (i) Find the brake thermal efficiency of a supercharged 4-cylinder, 4 stroke cycle Diesel engine with a bore and stroke of 10cmx16cm. Note: recquires unit analysis
A 1120 KW, six cylinder, 589 mm x 711 mm, 225 rpm, four stroke diesel engine has a fuel consumption of 0.23 kg/kWh based on 44,000 KJ/kg fuel (heating value). A waste heat recovery boiler recovers 28% of the exhaust loss. Jacket water loss are estimated at 30%. Assume losses due to friction, etc. at 10%. Calculate the quantity of 136 Kpa steam that can be produced in kg/hr, if jacket water at 70°C is used for boiler feed.
Consider a 4 stroke SI engine with a bore of 0.1 m. The spark is ignited 20 degrees bTDC. It takes 6 degrees CA for the combustion to enter the flame propagation phase. The flame terminates 14 degrees aTDC. The engine runs at 3600 rpm and the spark plug is placed at the center. What is the average flame speed?
Please solve with full explain and analyze max in 2 hours thank u Describe what is done in the combustion process in the combustion chamber of a gas turbine to overcome the problem of a very low laminar flame speed compared to aircraft speed and a limited flame limit range?
1. With 25% efficiency, how much work is produced by Q-in of 31076 J? (answer format: 0000 no units) 2. With the parameters given from the previous number, how much is Q-out? Answer format: 00000, no need for unit 3. With the parameters from the previous question, how much heat was wasted? answer format: 00000 no units pls help ill rate you
The part load efficiency curve for a microturbine running on natural gas is given below: Calculate the consumption of natural gas in m3/s when this microturbine is producing 10, 20, 30, 40, 50 and 60kW. Explain how you calculated your results and present your results in a table; then plot these fuel consumption values as a function of output power. Include your table of results and the plot in your assignment report. What are the key features of this plot of fuel consumption versus output power? [Assume that the energy content of natural gas is 38.7 MJ/m3]
The stroke volume of a 4-stroke, 4-cylinder, water-cooled, electronically fired engine operating according to the Otto cycle is 1796 cm³, compression ratio 10, cylinder diameter 80,6 mm and connecting rod length 137 mm. This engine operating at 3000 rpm with 15 KMA ignition advance;a) Combustion chamber volume (dead volume)b) Average piston speedc) Find the position of the piston in relation to the upper dead point at the time of ignition.
A 0.3 liter four cylinders engine that operates on a four-stroke cycle at 6000 rpm has brake power output of 40kW. The engine has a brake thermal efficiency of 30%. If the surrounding air is at 20°C and 1.03 ×105 Pa, calculate the bmep and the volumetric efficiency. Consider the heating value of fuel to be 44 MJ/kg, AF=11, combustion efficiency to be 97% and R= 287J/kg.K