Journal ArticleDOI
Laser versus conventional ignition of flames
TLDR
A critical review and comparison of the initiation of combustion processes by conventional electric spark or thermal means with laser sources is presented in this paper, where a description of the fundamentals of ignition processes is used as the basis for interpretation of experimental and theoretical studies of laser ignition.Abstract:
A critical review and comparison of the initiation of combustion processes by conventional electric spark or thermal means with laser sources is presented. A description of the fundamentals of ignition processes is used as the basis for interpretation of experimental and theoretical studies of laser ignition. It is shown that many features of laser ignition can be understood on the basis of simple thermal concepts, particularly when the effects of thermal or radical losses are considered. It is proposed that the main advantages of laser sources are likely to be in the timing and placement of ignition rather than the inherent energy requirements. Potential applications to combustion systems of practical importance, e.g., high-speed propulsion systems, are discussed and instructive laboratory-scale experiments are suggested.read more
Citations
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Journal ArticleDOI
Ignition of turbulent non-premixed flames
TL;DR: In this article, the initiation of turbulent non-premixed combustion of gaseous fuels through autoignition and through spark ignition is reviewed, motivated by the increasing relevance of these phenomena for new combustion technologies.
Journal ArticleDOI
Laser-induced spark ignition fundamental and applications
TL;DR: In this paper, the authors review past work to identify some fundamental issues underlying the physics of the laser spark ignition process and research needs in order to bring the laser ignition concept into the realm of reality.
Journal ArticleDOI
Fundamentals of high-energy spark ignition with lasers
TL;DR: In this article, an experimental study of laser-induced spark ignition of flammable, gaseous premixtures is reported, with theoretical interpretations, in an explosion bomb equipped with four variable-speed fans that facilitated the study of quiescent and isotropic turbulent conditions.
Journal ArticleDOI
Laser-induced spark ignition of CH4/air mixtures
Tran X. Phuoc,Fredrick P. White +1 more
TL;DR: In this paper, a laser-induced spark ignition of CH{sub 4}-air mixtures was experimentally investigated using a nanosecond pulse at 1,064 nm from a Q-switched Nd-Yag laser.
Journal ArticleDOI
On the critical flame radius and minimum ignition energy for spherical flame initiation
TL;DR: In this article, the authors studied the relationship between the critical flame radius and the minimum energy required to initiate a self-sustained propagating premixed flame in a quiescent mixture.
References
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Book
Internal combustion engine fundamentals
TL;DR: In this article, the authors describe real engine flow and combustion processes, as well as engine operating characteristics and their operation, including engine design and operating parameters, engine characteristics, and operating characteristics.
Journal ArticleDOI
Laser-induced breakdown of gases
TL;DR: In this paper, the authors examined the role of multiphoton absorption and inverse bremsstrahlung or cascade collisional ionization in the early stages of the formation of plasma.
Journal ArticleDOI
Initiation and propagation of flame fronts in lean CH4-air mixtures by the three modes of the ignition spark
Rudolf Maly,Manfred Vogel +1 more
TL;DR: In this paper, the initiation and subsequent propagation of flame fronts by breakdown, are and glow discharge ignition devices have been investigated by time resolved interferometry in CH4-air mixtures.
Proceedings ArticleDOI
Laser Ignited Internal Combustion Engine - An Experimental Study
TL;DR: In this paper, preliminary test results are presented for a spark ignition engine which uses a focused, laser beam and conventional spark ignition as ignition sources for a steady running, single cylinder engine with minimum spark for best torque (MBT) spark timing and fixed throttle position.
Journal ArticleDOI
The influence of flow parameters on minimum ignition energy and quenching distance
TL;DR: In this paper, the effects of pressure, velocity, mixture strength, turbulence intensity and turbulence scale on minimum ignition energy and quenching distance were carried out in a specially designed closed-circuit tunnel in which a fan was used to drive propane/air mixtures at sub-mospheric pressures through a 9 cm square working section at velocities up to 50 m/sec.