The Experts below are selected from a list of 4230 Experts worldwide ranked by ideXlab platform
Saiful Bari - One of the best experts on this subject based on the ideXlab platform.
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Exhaust Tuning of an Internal Combustion Engine by the Combined Effects of Variable Exhaust Pipe Diameter and an Exhaust Valve Timing System
Energies, 2018Co-Authors: Pauras Sawant, Michael Warstler, Saiful BariAbstract:Changes to engine geometry and specifications can produce better torque, power, volumetric efficiency and more. The technique known as wave tuning can lead to better engine torque and power. This paper focuses on increasing the engine torque by improving the Exhaust fluid flow through the Exhaust manifold. Phasing and intensity of the pressure waves in the Exhaust manifold have significant effects on scavenging, valve overlapping and pumping losses. In this research, individual and combined effects of variable Exhaust runner diameter and Exhaust valve timing on the fluid flow from Exhaust of the engine are studied using computer simulation. An engine simulation software, Ricardo Wave, is utilized in this research. The analysis is conducted on a 1-D model of a KTM 510 cc single cylinder, four-stroke Sl engine. The data gathered shows that varying only the Exhaust Pipe diameter continuously with speed yields an average of 4.23% improvement in torque from the original engine model. However, due to practical constraints, the diameter is limited to vary in three steps (36 mm, 45 mm and 60 mm). This has reduced the average improvement of torque to 3.78%. Varying the valve timing alone gains an average of 1.94% improvement in torque. Varying both the Exhaust Pipe diameter in three steps and the Exhaust valve timing yields an average of 4.69% improvement in torque. This average is conducted over the engine speed ranges from 2000 to 11,000 rpm.
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Continuously Varying Exhaust Pipe Length and Diameter to Improve the Performance of a Naturally Aspirated SI Engine
Volume 6: Energy, 2017Co-Authors: O. Aradhye, Saiful BariAbstract:Wave tuning is a concept which increases the volumetric efficiency of a naturally aspirated engine by providing a scavenging effect to clear out residual gases and increase inflow of fresh charge. This paper analyses the effects of tuning pulsating sonic wave produced over a broad range of speeds in the Exhaust manifold of a single cylinder 510 cc SI engine, on the power and torque of the engine. 1-D model of the engine is modeled using Ricardo Wave. The simulation results obtained through the parametric analysis are compared with the standard data provided by the engine testing. On average, 7% increase in torque and 6% increase in power are observed by continuously varying Exhaust Pipe length. While continuously varying Exhaust Pipe diameter, 6% increase in torque and power is observed. When combined together, the continuously varying Exhaust Pipe length and diameter produce 8.5% increased torque and 9% increased power, respectively.
Naikankatte Gowrav - One of the best experts on this subject based on the ideXlab platform.
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Thermal analysis of two wheeler Exhaust Pipe by Finite element method
International Journal of Research, 2018Co-Authors: Naikankatte GowravAbstract:Exhaust system in the bike is an important part of the motorcycle which play an important role in both economy and engine performance. Usually the Exhaust Pipe in general is used to carry the burnt gases from the outlet valve of the cylinder to the atmosphere. Depending on the capacity and engine design there might be one or more Exhaust Pipe. High pressure high temperature Exhaust gas enters the Exhaust Pipe which should be cooled and is converted to non-polluting gasses. The problem identified for this journal work is to ensure the uniform heat flow along the passage of hot gases and design the passage surface such has to identify the harmful effects of hot-spots over the length of the Exhaust Pipe especially at the outer body of Exhaust Pipe. And enhance the life of Exhaust Pipe. The Exhaust Pipe is considered which is modelled by CATIA V5 and is thermally analysed in ANSYS 19 where we find the percentage of elements at the different temperature.
Pierre Anthoine - One of the best experts on this subject based on the ideXlab platform.
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Experimental study of periodic heat transfer coefficient in the entrance zone of an Exhaust Pipe
International Journal of Thermal Sciences, 2008Co-Authors: Anthony Sorin, François Bouloc, Brahim Bourouga, Pierre AnthoineAbstract:The application of new standards of pollutant gas emission restrictions has forced the motor-car industry to improve their level of knowledge on heat transfers occurring between intermittent gas flows and Exhaust system Pipes. In this paper we present a study that we carried out in order to estimate the heat transfer coefficient in Exhaust Pipes. We developed an experimental device which re-creates engine working conditions. This experiment set up has been designed in order to check all assumptions of the theoretical model. Measurements are carried out with heat flux sensor, gas temperature probes and pressure sensor in the entrance zone of a cylindrical Exhaust Pipe. First results show that the heat transfer coefficient estimated in the case of an intermittent gas flow is higher than the one measured on a continuous flow with identical inlet conditions: same mass flow and inlet temperature. Measurements show that, for a given flow rate, the intensification of the heat transfer due to the flow intermittency corresponds to the eigen frequency of the Exhaust Pipe.
Pauras Sawant - One of the best experts on this subject based on the ideXlab platform.
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Exhaust Tuning of an Internal Combustion Engine by the Combined Effects of Variable Exhaust Pipe Diameter and an Exhaust Valve Timing System
Energies, 2018Co-Authors: Pauras Sawant, Michael Warstler, Saiful BariAbstract:Changes to engine geometry and specifications can produce better torque, power, volumetric efficiency and more. The technique known as wave tuning can lead to better engine torque and power. This paper focuses on increasing the engine torque by improving the Exhaust fluid flow through the Exhaust manifold. Phasing and intensity of the pressure waves in the Exhaust manifold have significant effects on scavenging, valve overlapping and pumping losses. In this research, individual and combined effects of variable Exhaust runner diameter and Exhaust valve timing on the fluid flow from Exhaust of the engine are studied using computer simulation. An engine simulation software, Ricardo Wave, is utilized in this research. The analysis is conducted on a 1-D model of a KTM 510 cc single cylinder, four-stroke Sl engine. The data gathered shows that varying only the Exhaust Pipe diameter continuously with speed yields an average of 4.23% improvement in torque from the original engine model. However, due to practical constraints, the diameter is limited to vary in three steps (36 mm, 45 mm and 60 mm). This has reduced the average improvement of torque to 3.78%. Varying the valve timing alone gains an average of 1.94% improvement in torque. Varying both the Exhaust Pipe diameter in three steps and the Exhaust valve timing yields an average of 4.69% improvement in torque. This average is conducted over the engine speed ranges from 2000 to 11,000 rpm.
Xingwei Wang - One of the best experts on this subject based on the ideXlab platform.
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A Fiber Optic Acoustic Pyrometer for Temperature Monitoring in an Exhaust Pipe of a Boiler
IEEE Photonics Technology Letters, 2019Co-Authors: Jingcheng Zhou, Xu Guo, Xinsheng Lou, Chengyu Cao, Xingwei WangAbstract:This letter presents a fiber optic acoustic pyrometer for temperature monitoring in an Exhaust Pipe of an industrial scale combustion test facility. The acoustic pyrometer consists of a fiber optic acoustic generator and a Fabry–Perot (FP) fiber sensor receiver. The proposed acoustic pyrometer was tested and verified at an Exhaust Pipe over the Industry Scale Burner Facility (ISBF) at GE’s Clean Energy Center, at a temperature of 320 °C. Further research on such fiber optic acoustic pyrometers will advance the study of 2D/3D temperature distribution reconstruction in industrial combustion facilities.