Results 51 to 60 of about 463,023 (218)

Wavelet based flickering flame detector using differential PIR sensors [PDF]

, 2011
A Pyro-electric Infrared (PIR) sensor based flame detection system is proposed using a Markovian decision algorithm. A differential PIR sensor is only sensitive to sudden temperature variations within its viewing range and it produces a time-varying ...
Kose, K., Çetin, A. Enis, Soyer, E. B., Toreyin, B. Ugur, Inac, Ihsan, Kose, Kivanc, Inac, I., Toreyinb, B. Ugur, Töreyin, Behçet Uğur, ÇETİN, AHMET ENİS, Soyer, E. Birey, Toreyin, B. U., Erden, Fatih, Cetind, A. Enis, Gunay, Osman, Gunayc, Osman, Gunay, O., Erden, F.   +17 more
core   +1 more source

Mass Production of Waste PVC‐Mediated Bamboo‐Derived Hard Carbon for Ultra‐Long Life Sodium Storage

Carbon Energy, EarlyView.
By a scalable PVC‐mediated bifunctional strategy, pre‐carbonized micrometer bamboo powder is converted into a functionally partitioned hard carbon anode with distinct domains. Featuring abundant internal closed pores and surface sp2‐enriched graphitic regions, this anode delivers exceptional high‐rate long‐cycle stability, retaining 93% capacity after ...
Wenjing Xu, Zhangliu Tian, Meng Wang, Song Liang, Yueyang Wang, YuSha Gao, Yinjie Wan, Ce Zhou, Yue Tan, Le Wu, Fuqiang Huang   +10 more
wiley   +1 more source

Study on the coupling mechanism and suppression characteristics of swirl premixing combustion self-excited oscillation

Case Studies in Thermal Engineering
The numerical simulation method was used to study the mutual influence of flow field disturbance, vortex change, flame structure change, heat release pulsation, and pressure pulsation on the coupling mechanism and suppression characteristics of self ...
Aiguo Liu, Xiaoqu Wu, Peng Wang, Hengwen Li, Yunjie Zhang   +4 more
doaj   +1 more source

Model constant C of turbulent NO reaction time model

Case Studies in Thermal Engineering, 2017
The NO concentration of turbulent jet flames with different fuel, jet velocity, and jet diameter are simulated with the turbulent NO reaction time model. The predicted NO profile has very good agreement with the experimental data.
Qiong Li, Yuexinzhu Lan, Peiyong Wang
doaj   +1 more source

LES evaluation of the effects of equivalence ratio fluctuations on the dynamic flame response in a real gas turbine combustion chamber [PDF]

, 2013
Large Eddy Simulations (LES) of a lean swirl-stabilized gas turbine burner are used to analyze mechanisms triggering combustion instabilities. To separately study the effect of velocity and equivalence ratio fluctuations, two LES of the same geometry are
Hermeth, Sebastian, Staffelbach, Gabriel, Gicquel, Laurent, Gicquel, Laurent Y.M., Poinsot, Thierry   +4 more
core   +1 more source

Global and Detailed Calculation of Tube Wall Temperature in a Process Furnace Steam Superheater

Chemie Ingenieur Technik, EarlyView.
This study presents a comparison between an iterative global model and multiple approaches to a new non‐iterative model with the purpose of predicting tube wall temperature of a superheater. The results show that the non‐iterative method achieves sufficient accuracy while improving the prediction of local temperature distribution and better ...
Anežka Michálková, Zdeněk Jegla
wiley   +1 more source

Suppression Mechanisms of Stratified Jet-in-Crossflow on Thermoacoustic Instability and NO_x Emissions in Premixed Combustors

Applied Sciences
The premixed combustion of a gas turbine is prone to thermoacoustic oscillation, which affects the safety of combustion systems. This study experimentally investigated the suppression mechanism of a stratified jet-in-crossflow on the thermoacoustic ...
Rongyue Sun, Chengfei Tao
doaj   +1 more source

Experimental methods in chemical engineering: Temperature‐programmed oxidation—TPO

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Temperature‐programmed oxidation (TPO) probes the oxidative capacity and redox properties of solid materials—catalysts, metal oxides, perovskites, and carbonaceous deposits. It identifies coke type, distribution, and reactivity. TPO instruments pass an oxidizing gas (diluted O2$$ {\mathrm{O}}_2 $$, air, or less commonly N2O$$ {\mathrm{N}}_2 ...
Gholamreza Roohollahi, Jildimara de Jesus Santana, Alexander R. P. Harrison, Sara Andreoli, Ewa Marek, Stuart Scott, Mohammad Latifi, Gregory S. Patience   +7 more
wiley   +1 more source

Prediction and Analysis of Borosilicate Glass Surface Deformation Induced by Flame Jet

Machines
To address the issues of low processing efficiency, poor forming accuracy, and internal damage in glass material processing, this study proposes the use of flame jet forming.
Biling Wang, Yutang Zhai, Xinming Zhang, Xinxin Qi, Weijie Fu   +4 more
doaj   +1 more source

Burned Gas Characteristics of Laminar Lifted Flame at the Beginning of Stream Heating

Journal of Thermal Science and Technology, 2011
This research experimentally investigates the exhaust gas characteristics of a methane-air lifted-jet flame with elevated stream temperatures up to 450 K. Emission indices of NOx and CO were measured by direct gas sampling using a gas detector tube.
Mitsutomo HIROTA, Hiroki OSO, Goro MASUYA   +2 more
doaj   +1 more source