Author: Arminta S. ChickaPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Performance of a Lean-burn Natural Gas Engine Using a Double-pulse Partially-stratified Charge Ignition System
Author: Arminta S. ChickaNatural Gas Engines
Author: Kalyan Kumar SrinivasanPublisher: Springer
ISBN: 9811333076
Category : Technology & Engineering
Languages : en
Pages : 419
Book Description
This book covers the various advanced reciprocating combustion engine technologies that utilize natural gas and alternative fuels for transportation and power generation applications. It is divided into three major sections consisting of both fundamental and applied technologies to identify (but not limited to) clean, high-efficiency opportunities with natural gas fueling that have been developed through experimental protocols, numerical and high-performance computational simulations, and zero-dimensional, multizone combustion simulations. Particular emphasis is placed on statutes to monitor fine particulate emissions from tailpipe of engines operating on natural gas and alternative fuels.
An Image-based Analysis of Stratified Natural Gas Combustion in a Constant Volume Bomb
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Current stoichiometric spark-ignited engine technologies require costly catalytic converters for reductions in tailpipe emissions. Load control is achieved by using a throttle, which is a leading contributor to reductions in efficiency. Spark-ignited lean burn natural gas engines have been proven to be more efficient and emit fewer pollutants than their stoichiometric counterparts. Load reduction in these engines can be achieved by regulating the air/fuel ratio of the intake charge thereby reducing the efficiency penalties inherent to throttling. Partially stratified charge (PSC) can provide further reductions in emissions and improvements in efficiency by extending the lean limit of operation. PSC is achieved by the ignition of a small quantity of natural gas in the vicinity of the spark plug. This creates an easily ignitable mixture at the spark plug electrodes, thereby providing a high energy ignition source for the ultra-lean bulk charge. Stratified charge engine operation using direct injection (DI) has been proposed as a method of bridging the throttleless load reduction gap between idle and ultra-lean conditions. A previous study was conducted to determine if PSC can provide a high-energy ignition source in a direct injected stratified charge engine. Difficulties with igniting the PSC injections in an air-only bulk charge were encountered. This study focuses on a fundamental Schlieren image-based analysis of PSC combustion. Natural gas was injected through a modified spark plug located in an optically accessible combustion bomb. The relationships between PSC injection timing, fuel supply pressure and spark timing were investigated. Spark timing is defined as the duration between commanded start of injection and the time of spark. As the fuel supply pressure was increased, the minimum spark timing that lead to successful combustion also increased. The largest spark timing window that led to successful combustion was determined to be 80 ms wide at an injection.
PARTIALLY STRATIFIED COMBUSTION OF NATURAL GAS FOR SPARK IGNITION ENGINES
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Abstract : In this work, the advantages of partially stratified direct injection natural gas versus premixed port-fueled injection natural gas spark ignited engines has been studied. The volumetric efficiency, ratio of specific heats and turbulent kinetic energy was found to be higher with direct injection versus port-fueled injection thus improving thermal efficiency. A background study of optical chamber experimental data was performed to develop an understanding on the effect of pressure ratio on direct injection of methane under both fully-expanded (sub-sonic) and under-expanded (super-sonic) conditions. Under-expanded jets had a noticeable advantage in terms of turbulent kinetic energy, which led to enhanced air entrainment and mixing. An experimental study using a 200bar four hole 1mm diameter injector was performed repeatedly for upstream versus downstream pressure ratios, within the range 1.3
Annual Index/abstracts of SAE Technical Papers
Author: Performance of a Spark Ignition, Lean Burn, Natural Gas Internal Combustion Engine
Author: Payman Abbasi AtibehPublisher:
ISBN:
Category : Internal combustion engines
Languages : en
Pages : 113
Book Description
Advances in Compression Ignition Natural Gas – Diesel Dual Fuel Engines
Author: Hongsheng GuoPublisher: Frontiers Media SA
ISBN: 2889666212
Category : Technology & Engineering
Languages : en
Pages : 125
Book Description
Chemical Abstracts
Author: A Computer Model of the Performance and Emissions of Lean Burn Natural Gas Spark Ignition Engines
Author: Marat DenuskiPublisher:
ISBN:
Category : Internal combustion engines
Languages : en
Pages : 198
Book Description
Author: Hongxun Gao