A Novel Beetle-Inspired Fuel Injection System for Improved Combustion Efficiency

2018 ◽  
pp. 467-475
Author(s):  
R. Kuppuraj ◽  
S. A. Pasupathy
Keyword(s):  
Fuel Injection ◽  
Combustion Efficiency ◽  
Injection System ◽  
Fuel Injection System

Emission and Performance of a Lean-Premixed Gas Fuel Injection System for Aeroderivative Gas Turbine Engines

1994 ◽  
Author(s):  
Timothy S. Snyder ◽  
Thomas J. Rosfjord ◽  
John B. McVey ◽  
Aaron S. Hu ◽  
Barry C. Schlein
Keyword(s):  
Gas Turbine ◽  
Fuel Injection ◽  
Pressure Ratio ◽  
Combustion Efficiency ◽  
Injection System ◽  
Test Facility ◽  
Fuel Injection System ◽  
Moderate Pressure ◽  
Single Digit ◽  
Lean Premixed

A dry-low-NOx, high-airflow-capacity fuel injection system for a lean-premixed combustor has been developed for a moderate pressure ratio (20:1) aeroderivative gas turbine engine. Engine requirements for combustor pressure drop, emissions, and operability have been met. Combustion performance was evaluated at high power conditions in a high-pressure, single-nozzle test facility which operates at full baseload conditions. Single digit NOx levels and high combustion efficiency were achieved A wide operability range with no signs of flashback, autoignition, or thermal problems was demonsuated. NOx sensitivities 10 pressure and residence time were found to be small at flame temperatures below 1850 K (2870 F). Above 1850 K some NOx sensitivity to pressure and residence Lime was observed and was associated with the increased role of the thermal NOx production mechanism at elevated flame temperatures.

Effect of transverse fuel injection system on combustion efficiency in scramjet combustor

Energy ◽  
2021 ◽  
Vol 218 ◽  
pp. 119511
Author(s):  
Kumari Ambe Verma ◽  
Krishna Murari Pandey ◽  
Mukul Ray ◽  
Kaushal Kumar Sharma
Keyword(s):  
Fuel Injection ◽  
Combustion Efficiency ◽  
Injection System ◽  
Fuel Injection System ◽  
Scramjet Combustor

scholarly journals Conical Grid Plate Flame Stabilizers for Combustor Primary Zones

1985 ◽  
Author(s):  
A. F. Ali ◽  
G. E. Andrews
Keyword(s):  
Residence Time ◽  
Fuel Injection ◽  
Combustion Efficiency ◽  
Shear Layers ◽  
Injection System ◽  
Fuel Injection System ◽  
Nox Emissions ◽  
Fuel Injector ◽  
Primary Zone ◽  
Grid Plate

Emission results are presented for a jet shear layer flame stabiliser design consisting of a 90° conical flame stabiliser with an array of holes and a central annular vaporiser fuel injection system. This design was tested with premixed propane and air and with direct propane injection into the vaporiser at two blockages and approach velocities. The results showed that an array of jet shear layers could be fuelled by a single fuel injector without incurring excessive NOx emissions. An increase in the primary zone residence time was found to result in an improved combustion efficiency, with no increase in NOx, provided that the stabiliser blockage was increased to maintain the pressure loss.

Ignition Characteristics on the Annular Combustor With Rotating Fuel Injection System

2004 ◽  
Author(s):  
Kang Yeop Lee ◽  
Seong Man Choi ◽  
Yeoung-Min Han ◽  
Jeong-Bae Park
Keyword(s):  
Fuel Injection ◽  
Combustion Efficiency ◽  
Injection System ◽  
Test Facility ◽  
Ignition Process ◽  
Fuel Injection System ◽  
Shaft Speed ◽  
Annular Combustor ◽  
Ignition Characteristics ◽  
Ignition And Combustion

An experimental study was performed to investigate the ignition characteristics on the annular combustor with rotating fuel injection system. The combustor was tested in KARI (Korea Aerospace Research Institute) combustor test facility. As the results of the test, equivalence ratio of lean ignition limit is 0.15 at 7,300 rpm and 0.08 at 10,400 rpm respectively. Combustion efficiency is gradually increased from 99.1% to 99.62% with increasing shaft speed from 15,000 rpm to 30,000 rpm. Over than 30,000 rpm, the combustion efficiency is not changed and kept constant. From the ignition and combustion test, ignition process of this annular combustor is mainly governed by the shaft speed. To understand the relationship between the spray characteristics and shaft speed, droplet size was measured by using PDPA system. In this spray test, Sauter mean diameter (SMD) largely depends on the shaft speed. SMD is changed from 73 μm to 42 μm with increasing the shaft speed from 5,000 rpm to 20,000 rpm.

Study on Wear-Preventing of Needle Valve in Fuel Injection System Mounted on DME Engine

2011 ◽  
Vol 228-229 ◽  
pp. 1057-1062
Author(s):  
Xin Rong Wen ◽  
Guang De Zhang ◽  
Wei Hua Wang ◽  
Xie Lu ◽  
Sun Jing
Keyword(s):  
Dynamic Stability ◽  
Structural Design ◽  
Fuel Injection ◽  
Dynamic Instability ◽  
Calculation Model ◽  
The Other ◽  
Injection System ◽  
Needle Valve ◽  
Fuel Injection System ◽  
Theoretical Support

The purpose of this paper is to provide theoretical support for the structural design to prevent the wear of needle. The actual wear of the orientation part of the needle in scrapped needles was researched. The presented results showed that the main reason to the wear of the orientation part of needle was the dynamic instability and the abrasives enter into the surface of orientation part which increases the wear, and that the calculation model of dynamic stability was proposed to prevent the wear of needle. This model was a pressure rod, one end of which was fixed, the other was free, and the two ends were pressed on axial force which changes with time. Besides, the classic formula of dynamic stability of pressure rod was changed rationally, so as to correspond with the calculation model. It will play a part in preventing the wear of needle.

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