International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 06 | June -2017
p-ISSN: 2395-0072
www.irjet.net
Experimental and CFD Analysis of Exhaust Manifold to Improve Performance of IC Engine Mr. SACHIN G. CHAUDHARI1, Mr. PARAG N. BORSE2, Mr. RAGHUNATH Y. PATIL3 1M.E.
Student, Dept. Of Mechanical Engineering, SGDCOE, Jalgaon (MS), India. Prof. Dept. Of Mechanical Engineering, SGDCOE, Jalgaon (MS), India. 3Head and Asso. Prof. Dept. Of Mechanical Engineering, SGDCOE, Jalgaon (MS), India. ------------------------------------------------------------------------***------------------------------------------------------------------------2Asso.
Abstract -Exhaust manifold collect the exhaust gases from the engine cylinders and discharge to the atmosphere through the exhaust system. The engine efficiency, combustion characteristics would depend upon how the exhaust gases were removed from the cylinder. The design of an exhaust manifold for the internal combustion engine depends on many parameters such as exhaust back pressure, velocity of exhaust gases etc. In this paper, the recent research on design of exhaust manifold, their performance evaluation using experimental methods as well as Numerical methods (CFD), various geometrical types of exhaust manifold and their impact on the performance has been collected and discussed.
2) Eliminate the unnecessary turbulence & eddies in the manifold.
2. EXPERIMENTATION Experimentation on Diesel engine Test rig For various manifold geometries are attached to engine one by one. First will take experiment on existing model which is Tsection. This experiment is conducted at SGDP College, Jalgaon, India. Every geometry is observed under different loads, Speed and Water flow rate of the engine take constant. Table 1: Engine Specifications:
Key words: Exhaust Manifold, Engine Efficiency, Back Pressure, Numerical Method, Experimental Method.
1
Engine type
1. INTRODUCTION 2
The exhaust system of an IC engine has a significant influence on the global engine operation. Among the different component of the system the exhaust Manifold has a paramount relevance on the gas exchange process. Though the intake system is dominant on the cylinder filling process, the exhaust manifold is able to influence the gas exchange process in several aspects, like the piston work during the exhaust stroke, the short-circuit of fresh charge from the intake into the exhaust and even the filling of the cylinder. In this sense, the most influential boundary condition imposed by the manifold is the pressure at the valve and especially the instantaneous pressure evolution. The mean backpressure is determined mainly by the singular elements, such as the turbine, the catalytic converter and the silencer. The instantaneous pressure evolution imposed by the manifold at the exhaust valve depends essentially on the layout and dimensions of the pipes, therefore an adequate design of the manifold geometry can improve the engine power and efficiency, and reduce the emissions of pollutants. Exhaust manifold design parameters are Minimum possible resistance in runners.
Rated power output
Single cylinder, four stroke compression ignition engine 5 H.P.
3
Speed
1500 R.P.M.
4
Stroke length
110 mm
5
Bore diameter
80mm
6 7 8
Type of dynamometer Lubricant Orifice diameter (for air box)
Rope brake dynamometer SAE 30/40 15mm
Co-efficient of 9
discharge for
0.64
orifice 10 11
Diameter of rope brake Drum Diameter of rope
250mm 25mm
1) Properly design of Manifold geometry to reduce the pressure drop.
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