A New Phenomenological Model for Combustion and Performance Studies of Direct Injection Diesel Engines

2007 ◽  
Author(s):  
Khashayar Ebrahimi ◽  
Majid Bazargan ◽  
Seyed Ali Jazayeri
Keyword(s):  
Performance Studies ◽  
Diesel Engines ◽  
Phenomenological Model ◽  
Direct Injection ◽  
And Performance

Effect of altitude conditions on combustion and performance of a turbocharged direct-injection diesel engine

2021 ◽  
pp. 095440702110262
Author(s):  
Zhentao Liu ◽  
Jinlong Liu
Keyword(s):  
Diesel Engine ◽  
High Altitude ◽  
Diesel Engines ◽  
Direct Injection ◽  
Pressure Rise ◽  
Ambient Conditions ◽  
Allowable Limit ◽  
Spray Formation ◽  
Direct Injection Diesel Engine ◽  
And Performance

Market globalization necessitates the development of heavy duty diesel engines that can operate at altitudes up to 5000 m without significant performance deterioration. But the current scenario is that existing studies on high altitude effects are still not sufficient or detailed enough to take effective measures. This study applied a single cylinder direct injection diesel engine with simulated boosting pressure to investigate the performance degradation at high altitude, with the aim of adding more knowledge to the literature. Such a research engine was conducted at constant speed and injection strategy but different ambient conditions from sea level to 5000 m in altitude. The results indicated the effects of altitude on engine combustion and performance can be summarized as two aspects. First comes the extended ignition delay at high altitude, which would raise the rate of pressure rise to a point that can exceed the maximum allowable limit and therefore shorten the engine lifespan. The other disadvantage of high-altitude operation is the reduced excess air ratio and gas density inside cylinder. Worsened spray formation and mixture preparation, together with insufficient and late oxidation, would result in reduced engine efficiency, increased emissions, and power loss. The combustion and performance deteriorations were noticeable when the engine was operated above 4000 m in altitude. All these findings support the need for further fundamental investigations of in-cylinder activities of diesel engines working at plateau regions.

A Phenomenological Model for Combustion and Emissions in Small Bore, High Speed, Direct Injection Diesel Engines

2005 ◽  
Author(s):  
N. A. Henein ◽  
I. P. Singh ◽  
L. Zhong ◽  
Y. Poonawala ◽  
J. Singh ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Diesel Engines ◽  
Phenomenological Model ◽  
High Speed ◽  
Gas Flow ◽  
Fuel Injection ◽  
Direct Injection ◽  
Injection System ◽  
Injection Process ◽  
Wide Range

This paper introduces a phenomenological model for the fuel distribution, combustion, and emissions formation in the small bore, high speed direct injection diesel engine. A differentiation is made between the conditions in large bore and small bore diesel engines, particularly regarding the fuel impingement on the walls and the swirl and squish gas flow components. The model considers the fuel injected prior to the development of the flame, fuel injected in the flame, fuel deposited on the walls and the last part of the fuel delivered at the end of the injection process. The model is based on experimental results obtained in a single-cylinder, 4-valve, direct-injection, four-stroke-cycle, water-cooled, diesel engine equipped with a common rail fuel injection system. The engine is supercharged with heated shop air, and the exhaust back pressure is adjusted to simulate actual turbo-charged diesel engine conditions. The experiments covered a wide range of injection pressures, EGR rates, injection timings and swirl ratios. Correlations and 2-D maps are developed to show the effect of combinations of the above parameters on engine out emissions. Emphasis is made on the nitric oxide and soot measured in Bosch Smoke Units (BSU).

Cultural Labour

2019 ◽  
Author(s):  
Brahma Prakash
Keyword(s):  
Conceptual Framework ◽  
Performance Studies ◽  
Life Experience ◽  
Social Hierarchies ◽  
Folk Performance ◽  
And Performance ◽  
The Relationship

Folk performances reflect the life-worlds of a vast section of subaltern communities in India. What is the philosophy that drives these performances, the vision that enables as well as enslaves these communities to present what they feel, think, imagine, and want to see? Can such performances challenge social hierarchies and ensure justice in a caste-ridden society? In Cultural Labour, the author studies bhuiyan puja (land worship), bidesia (theatre of migrant labourers), Reshma-Chuharmal (Dalit ballads), dugola (singing duels) from Bihar, and the songs and performances of Gaddar, who was associated with Jana Natya Mandali, Telangana: he examines various ways in which meanings and behaviour are engendered in communities through rituals, theatre, and enactments. Focusing on various motifs of landscape, materiality, and performance, the author looks at the relationship between culture and labour in its immediate contexts. Based on an extensive ethnography and the author’s own life experience as a member of such a community, the book offers a new conceptual framework to understand the politics and aesthetics of folk performance in the light of contemporary theories of theatre and performance studies.

scholarly journals Cultural History, Ritual and Performance: George L. Mosse in Context

2021 ◽  
pp. 002200942094003
Author(s):  
Peter Burke
Keyword(s):  
Political Culture ◽  
Early Modern ◽  
Cultural History ◽  
Performance Studies ◽  
Early Modern Europe ◽  
History Of ◽  
Nineteenth And Twentieth Centuries ◽  
Modern Europe ◽  
And Performance ◽  
Cultural Turn

George L. Mosse took a ‘cultural turn’ in the latter part of his career, but still early enough to make a pioneering contribution to the study of political culture and in particular what he called political ‘liturgy’, including marches, processions, and practices of commemoration. He adapted to the study of nationalism in the nineteenth and twentieth centuries the approach to the history of ritual developed by historians of medieval and early modern Europe, among them his friend Ernst Kantorowicz. More recently, the concept of ritual, whether religious or secular, has been criticized by some cultural historians on the grounds that it implies a fixed ‘script’ in situations that were actually marked by fluidity and improvisation. In this respect cultural historians have been part of a wider trend that includes sociologists and anthropologists as well as theatre scholars and has been institutionalized as Performance Studies. Some recent studies of contemporary nationalism in Tanzania, Venezuela and elsewhere have adopted this perspective, emphasizing that the same performance may have different meanings for different sections of the audience. It is only to be regretted that Mosse did not live long enough to respond to these studies and that their authors seem unaware of his work.

scholarly journals A systematic review of definitions of motor vehicle headways in driver behaviour and performance studies

2021 ◽  
Vol 77 ◽  
pp. 38-54
Author(s):  
Raaj Kishore Biswas ◽  
Rena Friswell ◽  
Jake Olivier ◽  
Ann Williamson ◽  
Teresa Senserrick
Keyword(s):  
Systematic Review ◽  
Performance Studies ◽  
Motor Vehicle ◽  
Driver Behaviour ◽  
And Performance
Sign in / Sign up

Export Citation Format

Share Document