Emission characteristics and heat release rate surrogates for ammonia premixed laminar flames

2021 ◽  
Author(s):  
Mengzhen Cheng ◽  
Haiou Wang ◽  
Hua Xiao ◽  
Kun Luo ◽  
Jianren Fan
Keyword(s):  
Heat Release ◽  
Heat Release Rate ◽  
Release Rate ◽  
Laminar Flames ◽  
Emission Characteristics ◽  
Premixed Laminar Flames ◽  
Premixed Laminar

Combustion and Emission Characteristics of Dual Fuel Engine for Different Parameters

2021 ◽  
Vol 13 (4) ◽  
Author(s):  
Jianjun Zhu ◽  
Peng Li ◽  
Yufeng Xie ◽  
Xin Geng
Keyword(s):  
Diesel Engine ◽  
Heat Release ◽  
Heat Release Rate ◽  
Compression Ratio ◽  
Release Rate ◽  
Emission Characteristics ◽  
Soot Emission ◽  
Cylinder Pressure ◽  
Fuel Delivery ◽  
Soot Emissions

The effects of compression ratio and fuel delivery advance angle on the combustion and emission characteristics of premixed methanol charge induced ignition by Fischer Tropsch diesel engine were investigated using a CY25TQ diesel engine. In the process of reducing the compression ratio from 16.9 to 15.4, the starting point of combustion is fluctuating, the peak of in-cylinder pressure and the maximum pressure increase rate decrease by 44.5% and 37.7% respectively. The peak instantaneous heat release rate increases by 54.4%. HC and CO emissions are on a rising trend. NOx and soot emissions were greatly decreased. The soot emission has the biggest drop of 50%. Reducing the fuel delivery advance angle will make the peak of in-cylinder pressure and the peak of pressure rise rate increase while the peak of heat release rate decreases. The soot emission is negatively correlated with the fuel delivery advance angle. When the fuel delivery advance angle is 16° CA, the soot emissions increased the most by 130%.

scholarly journals Effects Of Fe2O3 and Al2O3 Nanoparticle-Diesel Fuel Blends on the Combustion, Performance and Emission Characteristics of a Diesel Engine

2021 ◽  
Author(s):  
Mohammad Nouri ◽  
Amir Homayoon Meghdadi Isfahani ◽  
Alireza Shirneshan
Keyword(s):  
Diesel Engine ◽  
Heat Release ◽  
Heat Release Rate ◽  
Diesel Fuel ◽  
Release Rate ◽  
Emission Characteristics ◽  
Performance And Emission ◽  
Combustion Performance ◽  
Fuel Blends ◽  
Nanoparticle Additives

Abstract This research investigates the effects of the addition of Fe2O3 and Al2O3 nanoparticles (30, 60, and 90 ppm) and Fe2O3-Al2O3 hybrid nanoparticles to pure diesel fuel on the combustion, performance and emission characteristics of a diesel engine. The results indicated that fuel blends improved the combustion (in-cylinder pressure and heat release rate), performance (power, fuel consumption, and thermal and exergy efficiency), and emission characteristics of the engine. The results showed that the peak combustion pressure increased by 4% and the heat release rate was improved by 15% in comparison with pure diesel with the addition of the nanoparticles. Moreover, the rate of pressure rise increased by 18% compared to pure diesel with nanoparticle additives. Based on the results, the effects of Fe2O3 fuel blends on brake power, BTE, and CO emission were more than Al2O3 fuel blends, such that it increased power and thermal efficiency by 7.40 and 14%, respectively, and reduced CO emissions by 21.2%; moreover, the blends with Al2O3 nanoparticle additives in comparison with Fe2O3 nanoparticle blends showed a better performance in reducing BSFC (9%), NOx (23.9%), and SO2 (23.4%) emissions. Overall, the Fe2O3-Al2O3 hybrid fuel blend is the best alternative if the performance and emission characteristics of the engine are both considered.

An Acoustic Methodology to Measure Heat Release Rate Fluctuations From Unsteady Laminar Flames

2011 ◽  
Author(s):  
J. Li ◽  
F. Richecoeur ◽  
T. Schuller ◽  
Y. Huang
Keyword(s):  
Heat Release ◽  
Travel Time ◽  
Heat Release Rate ◽  
Release Rate ◽  
Time Lag ◽  
Ultrasonic Waves ◽  
Rate Of Change ◽  
Laminar Flames ◽  
Reacting Flow ◽  
Propagation Time

This paper presents first validations of an alternative method to optical diagnostics to evaluate unsteady heat release rate disturbances. The technique is based on the determination of the propagation time of ultrasonic waves crossing a reacting flow. A train of pulses is synthesized and transmitted to the space by a tweeter. This signal is captured before and after its passage through the flame. The cross-correlation of the two signals yields a narrow compressed pulse response with a main lobe corresponding to the time lag between the incident and transmitted signals. The technique is examined in two generic laminar configurations. For open flames featuring buoyancy effects, it is possible to link the rate of change of fluctuations of the sound travel time dΔt′/dt to heat release rate disturbances Q˙′. For pulsated confined flames, the situation is more complex and a transfer function must be defined between perturbations in the sound travel time Δt′ and heat release rate disturbances Q˙′. Measurements are compared to predictions using different techniques. A general agreement is obtain in term of phasing and amplitudes. This study shows that the proposed technique is very sensitive to small perturbations in the heat release rate and provides the basis for further developments oriented towards more practical configurations.

IMPLEMENTATION OF THE FLAMELET-GENERATED-MANIFOLD FOR PREMIXED LAMINAR FLAMES WITH HEAT LOSS

2018 ◽  
Author(s):  
Leonardo Donatti ◽  
Andre Carlos Contini ◽  
Cristian Alex Hoerlle ◽  
Leonardo Zimmer ◽  
Lisandro Maders ◽  
...  
Keyword(s):  
Heat Loss ◽  
Laminar Flames ◽  
Flamelet Generated Manifold ◽  
Premixed Laminar Flames ◽  
Premixed Laminar

Scale Modeling on the Effect of Air Velocity on Heat Release Rate in Tunnel Fire

2008 ◽  
Vol 18 (2) ◽  
pp. 111-124 ◽  
Author(s):  
C. Chen ◽  
L. Qu ◽  
Y. X. Yang ◽  
G. Q. Kang ◽  
W. K. Chow
Keyword(s):  
Heat Release ◽  
Heat Release Rate ◽  
Release Rate ◽  
Air Velocity ◽  
Tunnel Fire ◽  
Scale Modeling
Sign in / Sign up

Export Citation Format

Share Document