Steady-State Local Heat Flux Measurements in a Straight Pipe Extension of an Exhaust Port of a Spark Ignition Engine

2007 ◽  
Author(s):  
Noel Balzan ◽  
Brian P. Sangeorzan ◽  
Alex C. Alkidas
Keyword(s):  
Heat Flux ◽  
Steady State ◽  
Local Heat ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Straight Pipe ◽  
Exhaust Port ◽  
Flux Measurements ◽  
Local Heat Flux

scholarly journals Local heat flux measurements in a hydrogen and methane spark ignition engine with a thermopile sensor

2009 ◽  
Vol 34 (24) ◽  
pp. 9857-9868 ◽  
Author(s):  
J. Demuynck ◽  
N. Raes ◽  
M. Zuliani ◽  
M. De Paepe ◽  
R. Sierens ◽  
...  
Keyword(s):  
Heat Flux ◽  
Local Heat ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Flux Measurements ◽  
Local Heat Flux ◽  
Thermopile Sensor

scholarly journals Thermal parameters determination of battery cells by local heat flux measurements

2014 ◽  
Vol 271 ◽  
pp. 48-54 ◽  
Author(s):  
K.A. Murashko ◽  
A.V. Mityakov ◽  
J. Pyrhönen ◽  
V.Y. Mityakov ◽  
S.S. Sapozhnikov
Keyword(s):  
Heat Flux ◽  
Local Heat ◽  
Thermal Parameters ◽  
Flux Measurements ◽  
Local Heat Flux ◽  
Battery Cells

High-Temperature Heat Transfer Investigations Using Heterogeneous Gradient Sensors

2010 ◽  
Author(s):  
Sergey Z. Sapozhnikov ◽  
Vladimir Yu. Mityakov ◽  
Andrey V. Mityakov ◽  
Andrey A. Snarskii ◽  
Maxim I. Zhenirovskyy
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
High Temperature ◽  
Power Plant ◽  
Thermal Power ◽  
Local Heat ◽  
Working Temperature ◽  
Metal Metal ◽  
Flux Measurements ◽  
Local Heat Flux

The local heat flux measurements are limited by low working temperature of the gradient heat flux sensors (GHFS) [1–3]. The novel heterogeneous sensors (HGHFS) made from metal-metal or metal-semiconductor layered composites (so-called anisotropic thermoelements) have high temperature level of 1300 K and more. Theory of the HGHFS allows to choose thickness and angle of inclination for the layers of composite, and to forecast volt-watt sensitivity. The sensitivity of metal-metal sensors is typically on the order of 0.02 to 0.5 mV/W, and it is much beyond when semiconductors are used. HGHFS are used for a first time for heat flux measurements in the furnace of the industrial boiler which is in operating of the Thermal Power Plant (fossil fuel power plant) in the city of Kirov (Russia). The local heat flux at the surface of refractory-faced water wall is measured in different regimes of operating. It is also shown that HGHFS may be used as indicator of furnace slugging. Small sizes (minimally 2×2×0.1 mm) and high working temperature of the HGHFS are useful for heat transfer investigations.

Temperature and Heat Flux Measurements in a Spark Ignition Engine

2000 ◽  
Author(s):  
C. R. Stone ◽  
E. P. Lim ◽  
P. Ewart ◽  
G. Lloyd ◽  
R. B. Williams
Keyword(s):  
Heat Flux ◽  
Spark Ignition ◽  
Spark Ignition Engine ◽  
Flux Measurements

Transient Heat Flux Measurements in a Divided-Chamber Diesel Engine

1985 ◽  
Vol 107 (2) ◽  
pp. 439-444 ◽  
Author(s):  
A. C. Alkidas ◽  
R. M. Cole
Keyword(s):  
Heat Flux ◽  
Diesel Engine ◽  
Fluid Motion ◽  
Local Heat ◽  
Relative Increase ◽  
Heat Fluxes ◽  
Main Chamber ◽  
Peak Heat Flux ◽  
Flux Measurements ◽  
Local Heat Flux

Transient surface heat flux measurements were performed at several locations on the cylinder head of a divided-chamber diesel engine. The local heat flux histories were found to be significantly different. These differences are attributed to the spatial nonuniformity of the fluid motion and combustion. Both local time-averaged and local peak heat fluxes decreased with decreasing speed and load. Retarding the combustion timing beyond TDC decreased the peak heat flux in the antechamber but increased the peak heat flux in the main chamber. This is attributed to the relative increase in the portion of fuel that burns in the main chamber with retarded combustion timing.

scholarly journals Transient Heat-Flux Measurements in the Combustion Chamber of a Spark-Ignition Engine

1982 ◽  
Vol 104 (1) ◽  
pp. 62-67 ◽  
Author(s):  
A. C. Alkidas ◽  
J. P. Myers
Keyword(s):  
Heat Flux ◽  
Combustion Chamber ◽  
Stoichiometric Composition ◽  
Spark Ignition ◽  
Volumetric Efficiency ◽  
Spark Ignition Engine ◽  
High Rate ◽  
Cycle Variation ◽  
Peak Heat Flux ◽  
Flux Measurements

Heat-flux measurements were obtained at several locations on the cylinder head and liner of a four-stroke, single-cylinder, spark-ignition engine. The variations of heat transfer with air-fuel ratio and volumetric efficiency were investigated. The magnitude of the heat flux was found to be highest at near-stoichiometric composition, whereas at either leaner or richer composition the heat flux decreased. An increase in volumetric efficiency from 40 to 60 percent resulted in an increase in peak heat flux of about 30 percent. The largest cycle-to-cycle variation in the measured heat flux occurred at the time of the initial high rate of heat flux. This is related to the cycle-to-cycle variation of flame propagation in the combustion chamber. Finally, the calculated amount of heat transferred to the walls of the combustion chamber during the closed portion of the engine cycle (intake valve closing to exhaust valve opening) agreed with the corresponding values obtained from the heat-flux measurements.

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