CFD analysis of diesel-methanol blend in 4-stroke variable compression ratio internal combustion engine

2021 ◽  
Author(s):  
K. Ratna Kumari ◽  
D. Maneiah ◽  
A. Raji Reddy ◽  
Maughal Ahmed Ali Baig ◽  
G. Krishna Vamshi
Keyword(s):  
Internal Combustion Engine ◽  
Compression Ratio ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Cfd Analysis ◽  
Variable Compression Ratio ◽  
Variable Compression

scholarly journals Temperature, Heat Distribution and Performance Analysis in a Variable Compression Ratio Internal Combustion Engine

2020 ◽  
Vol 8 (5) ◽  
pp. 4825-4829
Keyword(s):  
Heat Loss ◽  
Compression Ratio ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Mechanical Energy ◽  
Cooling Water ◽  
Internal Combustion ◽  
Heat Distribution ◽  
Variable Compression Ratio ◽  
Variable Compression

The internal combustion engines are also known as heat engines because of the utilization of heat energy of the fuel to convert it in to mechanical energy of the engine which finally runs the vehicle. Therefore, it is necessary to examine the generation and utilization of heat inside and outside the engine. For the above mentioned purpose, a variable compression ratio engine was used to perform experiment. The heat distribution of the used engine was investigated to recognize the heat loss areas from the engine. The experiments were performed by changing compression ratio from 15 to 21 and an optimum compression ratio was found. The experiments are further extended to find an optimum load value at standard compression ratio of the engine. The analysis was performed by using various factor of heat utilization such as heat supplied by fuel, heat equivalent to brake power, heat loss to exhaust gases, heat loss to engine cooling water and heat unaccounted. The proposed research will be useful to overcome the challenges during selection of compression ratio for design of an engine in industries.

Effects of Compression Ratio on Performance and Emission of Internal Combustion Engine with Used Vegetable Oil Methyl Easter

2013 ◽  
Vol 768 ◽  
pp. 250-254
Author(s):  
N. Balakrishnan ◽  
K. Mayilsamy ◽  
N. Nedunchezhian
Keyword(s):  
Internal Combustion Engine ◽  
Vegetable Oil ◽  
Compression Ratio ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Maximum Pressure ◽  
Base Line ◽  
Promising Alternative ◽  
Performance And Emission ◽  
Used Vegetable Oil

Biomass derived vegetable oil is a promising alternative fuel for an internal combustion engine. Direct use of vegetable oil has inferior performance with higher emission due to its higher viscous in nature. This can be overcome by transesterification process with its byproduct which is called as used vegetable oil methyl ester. While blending this biodiesel with fossil diesel upto maximum of 30:70, will give the higher performance and lower emission than the fossil diesel alone. In this present study biodiesel in the form of B23 is used in a four stroke water cooled variable compression ratio engine without any modifications. The performance and emission characteristics are studied with different compression ratio and compared with a base line fossil diesel mode operation. This study reveals that the compression ratio of 18 is the optimum in the view of ignition delay, maximum pressure crank angle, exhaust gas temperature and Smoke emission.

The Measurement of Air Velocity in a Motored Internal Combustion Engine Using a Hot-Wire Anemometer

1970 ◽  
Vol 185 (1) ◽  
pp. 583-591 ◽  
Author(s):  
H. Hassan ◽  
J. C. Dent
Keyword(s):  
Fixed Point ◽  
Internal Combustion Engine ◽  
Constant Temperature ◽  
Compression Ratio ◽  
Engine Speed ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Hot Wire ◽  
Gas Velocity ◽  
Air Velocity

The application of the constant temperature hot-wire anemometer to the measurement of instantaneous gas velocity in the pre-chamber of a motored I.C. engine is shown to be possible. The correction of the anemometer output to allow for the operation of the wire at conditions greatly removed from those of a windtunnel calibration are discussed. The variation of gas velocity at a fixed point in the pre-chamber with variation of engine compression ratio and engine speed was studied.

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