Influencing factors of wall temperature and flame stability of micro-combustors in micro-thermophotovoltaic and micro-thermoelectric systems

Fuel ◽  
2021 ◽  
pp. 122436
Author(s):  
Peng Qian ◽  
Minghou Liu
Keyword(s):  
Influencing Factors ◽  
Wall Temperature ◽  
Flame Stability ◽  
Thermoelectric Systems

Laboratory Combustibility Testing of Solid Fuel

1980 ◽  
Vol 102 (3) ◽  
pp. 666-671
Author(s):  
E. C. Winegartner ◽  
C. J. Lin
Keyword(s):  
Residence Time ◽  
Wall Temperature ◽  
Solid Fuels ◽  
Excess Oxygen ◽  
Flame Stability ◽  
Firing Rates ◽  
Low Load ◽  
Carbon Burnout ◽  
Load Conditions

A laboratory furnace having a controlled wall temperature is used to measure the combustibility of coal and other solid fuels. Operation at wall temperatures of 1260–1370°C (2300°–2500° F) permits determination of percent carbon burnout as a function of residence time and excess oxygen under furnace conditions representative of those encountered in large boilers. Operation at decreasing wall temperatures provides information on flame stability under conditions approaching those encountered under low load conditions in operating boilers. Firing rates are generally in the range of 11.7–29.3 KWt (40–100k BTU/hr) permitting testing of 100–150 kg (200–300 lb.) samples which can reasonably be obtained by core drilling or from small pilot units.

Flame Chromatography: Toward Fuel Indexing Based on Multiple Weak Flames in a Meso-Scale Channel With a Prescribed Temperature Profile

2011 ◽  
Author(s):  
Kaoru Maruta
Keyword(s):  
Temperature Profile ◽  
Wall Temperature ◽  
Wide Temperature Range ◽  
Ignition Temperature ◽  
Flame Stability ◽  
Research Octane Number ◽  
Multi Stage ◽  
Auto Ignition ◽  
First Time ◽  
Meso Scale

For understanding flame stability in microcombustor, fundamental studies on the combustion characteristics in a meso-scale channel with a prescribed wall temperature profile have been conducted. Results showed that the existence of dynamic oscillatory flames and weak flames in addition to the normal propagating flames for the first time. It is then recognized that the weak flame phenomena can be applied for examining multi-stage oxidation of hydrocarbon fuels in wide temperature range from 300K up to auto-ignition temperature. Based on the preliminary experiments with various fuels including primary referenced fuel for gasoline, research octane number (RON) of the test fuels can be clearly described by the aspects of the stabilized stationary multiple weak flames. The methodology can be termed “flame chromatography” and it is expected to be applied for fuel indexing of future alternative fuel characterizations.

Effect of a catalytic segment on flame stability in a micro combustor with controlled wall temperature profile

Energy ◽  
2018 ◽  
Vol 165 ◽  
pp. 522-531 ◽  
Author(s):  
Shixuan Wang ◽  
Linhong Li ◽  
Yongfang Xia ◽  
Aiwu Fan ◽  
Hong Yao
Keyword(s):  
Temperature Profile ◽  
Wall Temperature ◽  
Flame Stability ◽  
Micro Combustor

POSSIBLE INFLUENCING FACTORS OF BOWEL CLEANLINESS DURING COLONOSCOPY

2018 ◽  
Author(s):  
I Iozsef ◽  
O Ilyés ◽  
P Miheller ◽  
AV Patai
Keyword(s):  
Influencing Factors

Reliability-Based Assessment of the Truck Safe Following Distance Considering Multiple Influencing Factors

CICTP 2017 ◽  
2018 ◽  
Author(s):  
Bowen Dong ◽  
Wenjun Du ◽  
Feng Chen ◽  
Qi Deng ◽  
Xiaodong Pan
Keyword(s):  
Influencing Factors

Entrepreneurial Mindset

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Nusa FAIN ◽  
Michel ROD ◽  
Erik BOHEMIA
Keyword(s):  
Influencing Factors ◽  
Future Study ◽  
Engineering Students ◽  
Initial Study ◽  
Longitudinal Survey ◽  
Teaching Approaches ◽  
Approaches To Teaching ◽  
Design Students ◽  
Commerce Students ◽  
Case Based

This paper explores the influence of teaching approaches on entrepreneurial mindset of commerce, design and engineering students across 3 universities. The research presented in this paper is an initial study within a larger project looking into building ‘entrepreneurial mindsets’ of students, and how this might be influenced by their disciplinary studies. The longitudinal survey will measure the entrepreneurial mindset of students at the start of a course and at the end. Three different approaches to teaching the courses were employed – lecture and case based, blended online and class based and fully project-based course. The entrepreneurial mindset growth was surprisingly strongest within the engineering cohort, but was closely followed by the commerce students, whereas the design students were slightly more conservative in their assessments. Future study will focus on establishing what other influencing factors beyond the teaching approaches may relate to the observed change.

Analysis of LPG diffusion flame in tube type burner

2019 ◽  
Vol 13 (3) ◽  
pp. 5278-5293
Author(s):  
Vipul Patel ◽  
Rupesh Shah
Keyword(s):  
Diffusion Flame ◽  
Emission Characteristic ◽  
Flame Stability ◽  
Liquefied Petroleum Gas ◽  
Air Velocity ◽  
Length Fraction ◽  
Low Emission ◽  
Tube Type ◽  
Stability Limits ◽  
Co Emission

The present research aims to analyse diffusion flame in a tube type burner with Liquefied petroleum gas (LPG) as a fuel. An experimental investigation is performed to study flame appearance, flame stability, Soot free length fraction (SFLF) and CO emission of LPG diffusion flame. Effects of varying air and fuel velocities are analysed to understand the physical process involved in combustion. SFLF is measured to estimate the reduction of soot. Stability limits of the diffusion flame are characterized by the blowoff velocity. Emission characteristic in terms of CO level is measured at different equivalence ratios. Experimental results show that the air and fuel velocity strongly influences the appearance of LPG diffusion flame. At a constant fuel velocity, blue zone increases and the luminous zone decreases with the increase in air velocity. It is observed that the SFLF increases with increasing air velocity at a constant fuel velocity. It is observed that the blowoff velocity of the diffusion flame increases as fuel velocity increases. Comparison of emission for flame with and without swirl indicates that swirl results in low emission of CO and higher flame stability. Swirler with 45° vanes achieved the lowest CO emission of 30 ppm at Φ = 1.3.

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