18 A single-cylinder, two-stroke cycle model airplane engine with a 7.54-cm displace ment produces 142 kW of brake power at 23,000 RPM using glow plug ignition. The square en- gine (bore stroke) uses 31.7 gm/min of castor oil-methanol-nitrome thane fuel at an air-fuel ratio AF = 4.5. During intake scavenging. 65% of the incoming air-fuel mixture gets trapped in the cylinder, while 35% of it is lost with the exhaust be fore the exhaust port closes. Combustion efficiency n = 0.94. Calculate: (a) Brake specific fuel consumption. [gm/kW-hr] (b) Average piston speed. [m/sec] (c) Unburned fuel exhausted to atmosphere. [gm/min] (d) Torque. [N-m]

18 A single-cylinder, two-stroke cycle model airplane engine with a 7.54-cm displace ment produces 142 kW of brake power at 23,000 RPM using glow plug ignition. The square en- gine (bore stroke) uses 31.7 gm/min of castor oil-methanol-nitrome thane fuel at an air-fuel ratio AF = 4.5. During intake scavenging. 65% of the incoming air-fuel mixture gets trapped in the cylinder, while 35% of it is lost with the exhaust be fore the exhaust port closes. Combustion efficiency n = 0.94. Calculate: (a) Brake specific fuel consumption. [gm/kW-hr] (b) Average piston speed. [m/sec] (c) Unburned fuel exhausted to atmosphere. [gm/min] (d) Torque. [N-m]

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

Engine Type Four cylinder Four stroke Diesel engine, Bore: 0.073m, Stroke: 0.0889m Capacity: 1489cc, Power: 36 H.P. at 4000 rpm, Torque : 8.5 kg.m at 2250 rpm and Compression Ratio :17.3:1 Explain how to measure the :- (i) Fuel consumption. (ii) (iii) RPM, power output etc. (iv) Study of various components of diesel engine. Manometer readings for air flow.
bore and stroke of the fuel pump. 2. A 4-cylinder, 4-stroke, diesel engine, has the following parameters: brake power 100 hp, engine speed = 25 r.p.s, b.s.f.c. = 213 g/kW.hr, fuel density = 0.85 g/cm³, a = 1.2, and z = 1.25. Calculate: (i) Volume of fuel injected for one cylinder. (ii) Bore and stroke of the fuel pump. 3. A 4-stroko
OCTOBER 021 Q1 The following results were objained during a test on a two-cylinder, ur-atroke cycle, oil engine over a period of one hour Cylinder diameter, 108 mm. Pistop stroke, 135 mm Speed, 16 5rev/ Brake torgue, 90 Nm Fuel consumption, 2:5kg. Calorific value of fuel, 45 500 k/kg Mechanical efficiency, 82%. The exhaust gases, on leaving the cylinders were passed through an cahaust gas calorimeter and raised the temperature of 215kg oỆ waler from Determine, (n) the brake thermal efficicncy, 1b) the percemtage of the energy supplied by the fuel whch is carried away by the cocling water, Inction and radistion. () the indicated mean effective pressure, d) the indicated specific fuel consumplion
Engine Type: Single cylinder Four stroke Diesel engine, Bore: 0.0875m, Stroke: 0.11m Capacity: 661.5 cc, Power: 6 H.P. at 1500 rpm, Torque: 2.96 kg.m at 1500 rpm and Compression Ratio :17.5:1 Explain how to measure the :- Fuel consumption. Inclined manometer readings for air flow. RPM, power output etc. (iv) Study of various components of diesel engine. (ii)
02: A 4-stroke, 4-cylinder, 2.5 liter, SI engine operates on 3000 RPM. The engine has a compression ratio of 8.6:1, a mechanical efficiency of 86%, and an indicated power of 103 kW. Calculate: (i) Cylinder clearance volume. (ii) Brake mean effective pressure. (iii) Output per displacement. Q3: A race car burns nitromathane (CH;NO2) with air at an equivalence ratio of 1.1 assuming all nitrogen in fuel ends up as N2. Determine the AF ratio and the percentage analysis of the combustion products. 04: The following data concerns a 4-stroke engine: I.V. opening period = E.V. opening period, I.V.C. = 56° ABDC, E.V.O. = 47° BBDC, and the overlap angle = 33°. Calculate: all the missing angles, and the opening period. Then, draw the valve timing diagram.
A crawler with 1.5 m diesel engine has the following information: Cost of equipment Shipping cost Unkoading &assembling at destination Engine Crankcase capacity 1lours between oil changes Operating factor Useful life, with no salvage value Hours operated per year Weight Cost of fuel per liter Cost of oil per liter Maintenance $82260 $2448 $220 160 hp 22.71 liter 100 hr 06 6 vears 2000 61700 kg 0.33 $/liter 0.53 S/liter 100% of Depreciation 12% of Average Valuc Investment 1- what is the initial capital cost of the crawler?
13. A four-cycle six cylinder diesel engine of 4 % in bore and 6-in stroke running at 1200 rpm, has 9 percent CO, present in the exhaust gases. The fuel consumption is 28 lb/hr. Assuming that 13.7 percent CO2 indicates an air-fuel ratio of 15 Ib of air to 1 ib of fuel, calculate the volumetric efficiency of the engine. The intake air temperature is 60 deg. F and the barometric pressure is 29.80 in of Hg. A. 83% B. 81% C. 87% D. 92% 50
(e) Calculate the angular velocity of the gas mixture sing paddle wheel model of two- cylinder engine by assuming swirl ratio is 11. Use the following data: i. air to fuel ratio 8.8 ii. compressiom ratio-7.2 ii, volunetric efficiency77 iv. indicated thermal efficiency 33 v. mechanical efficiency55 vi. brake power 62000 j/sec vii. engine volmne 1000 cm3 vi. calorific value 45000 kj/m
& Calculate the air standard efficiency of a four stroke Otto cycle engine with the following data : Piston diameter (bore) = 137 mm ; Length of stroke = 130 mm ; Clearance volume 0.00028 m². Express clearance as a percentage of swept volume. [Ans. 56.1% ; 14.6%)
A 292-in.³. V8, four-stroke cycle CI engine operates at 1800 RPM, using light diesel fuel at AF = 24 and a volumetric efficiency of 94%. Injection timing is from 22° bTDC to 4° aTDC. Swirl ratio, as defined by Eq. (6-1), equals 2.8 during fuel injection. Calculate: (a) Time of one injection. [see] (b) Period of swirl (one rotation). [see] (c) Number of orifice holes needed in each injector, with one injector per cylinder.
Provide a complete and logical solution for each problem. If linear interpolation is required in the problem, tabulated values is considered as a solution. Also, provide T-S or P-V diagrams for each problem 1. An ideal otto cycle engine with 15% clearance operates on 0.227 kg/s of air: intake state is 100.58 kPa, 37.7°C. The energy released during combustion is 110 kJ/s. For hot-air standard, with k = 1.32, compute: a. Pat each point in kPa b. T at each point in K c. V at each point in m d. Efficiency of the cycle 2. For a Rankine Cycle, steam at 5 MPa, 450°C expands to 0.036 MPa. For 10 kg/s of steam, determine: a. Heat added b. Heat rejected c. Work of turbine d. Thermal Efficiency
Question: Please compute the compression ratio of an engine that has a bore of 5 inches and a stroke of 5 inches when the volume at the combustion chamber is 16.36 cubic. in. with the piston at TDC. Please provide a complete solution. Thak you!