Simultaneous In-Cylinder Surface Temperature Measurements with Thermocouple, Laser-induced Phosphorescence, and Dual Wavelength Infrared Diagnostic Techniques in an Optical Engine

Luo, Xisheng; Yu, Xin; Jansons, Marcis

doi:10.4271/2015-01-1658

Cited by 13 publications

(4 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[6]. Ancak, yapılan çalışmalarda duvar sıcaklığı değişiminin çevrim boyunca ihmal edilebilir seviyelerde olduğu görülmektedir [14], [16], [17]. Bu çalışmada, yanma odası duvar sıcaklığı 𝑇 𝑑 sabit 450 K kabul edilmiştir.…”

Section: Introductionunclassified

Investigation of heat transfer in combustion chamber of a direct injection diesel engine under different compression ratios and engine torques

ŞANLI¹,

Gümüş²

2022

Pamukkale J Eng Sci

View full text Add to dashboard Cite

Section: Introductionunclassified

Investigation of heat transfer in combustion chamber of a direct injection diesel engine under different compression ratios and engine torques

ŞANLI¹,

Gümüş²

2022

Pamukkale J Eng Sci

View full text Add to dashboard Cite

“…However, it is extremely difficult to grasp or understand the spatial/ temporal variation of heat flux distribution and the correlation between the heat flux variation/distribution and turbulent flame structure only with point measurements. On the other hand, as measurement techniques applicable to 2-D imaging of temperature and heat flux variations and distributions, laser-induced phosphorescence 1,[21][22][23][24][25] and infrared thermography [25][26][27][28] have been explored in engines and under engine equivalent conditions.…”

Section: Introductionmentioning

confidence: 99%

Infrared high-speed thermography of combustion chamber wall impinged by diesel spray flame

Aizawa

Kinoshita

Akiyama

et al. 2021

International Journal of Engine Research

View full text Add to dashboard Cite

As a demonstration of a new method to examine the extremely unsteady and spatially varying wall heat transfer phenomena on diesel engine combustion chamber wall, high-speed imaging of infrared thermal radiation from the wall surface impinged by a diesel spray flame was attempted using a high-speed infrared camera. A 35 mm-diameter chromium-coated quartz window surface was impinged by a diesel spray flame with an impinging distance of 27 mm from the nozzle orifice in a constant volume combustion chamber. The infrared thermal radiation from the back surface of the 0.6 µm thick chromium layer was successfully visualized at 10 kHz frame rate and 128 × 128 pixel resolution through the quartz window. The infrared radiation exhibited coherent and streaky structure with radial stripes extending and waving from the stagnation point. The width of the radial stripes, spatial amplitude and the period of the waving movement were comparable to the ones for turbulent heat transfer on the engine cylinder wall previously measured with a heat flux sensor, suggesting that they are resulting from the turbulent structure in the wall-impinging diesel flame. The radiation intensity was calibrated to temperature and converted to heat flux via 3-D numerical analysis of transient thermal conduction in the quartz window. The peak-to-peak variation amplitudes of temperature and heat flux among the radial stripes during the diesel spray flame impingement were about 20 K and 2.3 MW/m2, corresponding to 13% of 150 K maximum temperature swing amplitude and 18 MW/m2 maximum heat flux, respectively.

show abstract

“…Multiple diagnostics have been used to measure in-cycle thermal information on the surface of the combustion chamber, in particular thermocouples, 8,9 resistance temperature detectors (RTD), 10,11 thermopiles, 12–14 laser-induced phosphorescence (LIP) 15,16 and infrared thermometry. 15,17 The most common is thin-junction thermocouple and is the one used here; as with every other method but thermopiles, a surface temperature is measured, which allows us to recover heat flux via a mathematical model. Thermopiles provide direct heat flux information with minimal data processing, but require a large surface area (causing significant spatial averaging) and have larger response times than other methods.…”

Section: Introductionmentioning

confidence: 99%

High-frequency wall heat flux measurement during wall impingement of a diffusion flame

Moussou

Pilla

Sotton

et al. 2019

International Journal of Engine Research

View full text Add to dashboard Cite

The efficiency of internal combustion engines is limited by heat losses to the wall of the combustion chamber. A precise characterization of wall heat flux is therefore needed to optimize engine parameters. However, the existing measurements of wall heat fluxes have significant limitations; time resolution is often higher than the timescales of the physical phenomena of flame–wall interaction. Furthermore, few studies have investigated diesel flame conditions (as opposed to propagation flames). In this study, the heat flux generated by a diffusion flame impinging on a wall was measured with thin-junction thermocouple, with a time resolution of the whole acquisition chain better than 0.1 ms. The effects of variations in ambient gas temperature, injection pressure and injector–wall distance were investigated. Diesel spray impingement on the wall is shown to cause strong gas–wall thermal exchange, with convection coefficients of 6–12 kW/m2/K. Those results suggest the necessity of close-wall aerodynamic measurements to link macroscopic characteristics of the spray (injection pressure, impingement geometry) to turbulence values.

show abstract

Simultaneous In-Cylinder Surface Temperature Measurements with Thermocouple, Laser-induced Phosphorescence, and Dual Wavelength Infrared Diagnostic Techniques in an Optical Engine

Cited by 13 publications

References 15 publications

Investigation of heat transfer in combustion chamber of a direct injection diesel engine under different compression ratios and engine torques

Investigation of heat transfer in combustion chamber of a direct injection diesel engine under different compression ratios and engine torques

Infrared high-speed thermography of combustion chamber wall impinged by diesel spray flame

High-frequency wall heat flux measurement during wall impingement of a diffusion flame

Contact Info

Product

Resources

About