An Experimental Investigation on the Spray Flows Exhausted from a Counter-swirling Air-blast Nozzle

2012 ◽  
Author(s):  
Daniel Dvorak ◽  
Spencer Peck ◽  
Hui Hu
Keyword(s):  
Experimental Investigation ◽  
Air Blast ◽  
Spray Flows

Development and Experimental Investigation of a Tubular Combustor for Pyrolysis Oil Burning

2014 ◽  
Author(s):  
Martin Beran ◽  
Lars-Uno Axelsson
Keyword(s):  
Experimental Investigation ◽  
Gas Turbine ◽  
Droplet Size ◽  
Gas Turbines ◽  
Alternative Fuels ◽  
Fossil Fuels ◽  
Heat Content ◽  
Pyrolysis Oil ◽  
Load Range ◽  
Air Blast

The growing demand for more economical and environmentally friendly power generation forces the industry to search for fuels that can replace the conventional fossil fuels. This has led to significant developments in the production of alternative fuels during the last years, which have made them a reliable and relatively efficient source of energy. One example of these alternative fuels is the pyrolysis oil. However, higher viscosity, lower heat content, limited chemical stability and its ability to create sediment make pyrolysis oil challenging for gas turbines. The OPRA OP16 gas turbine is an all radial single-shaft gas turbine rated at 1.9 MW. The all radial design, together with the lack of intricate cooling geometries in the hot section, makes this gas turbine suitable for operation on these fuels. This paper presents an experimental investigation of pyrolysis oil combustion in a tubular combustor developed especially for low-calorific fuels. The experiments have been performed in an atmospheric combustion test rig and the results have been compared to the results obtained from ethanol and diesel combustion. It was found that it was possible to burn pure pyrolysis oil in the load range between 70 to 100% with a combustion efficiency exceeding 99% and without creation of sediments on the combustor inner wall. It was found that the NOx emissions were similar for pyrolysis oil and diesel, whereas the CO emissions were twice as high for pyrolysis oil. A comparison between the air blast nozzle and the pressure nozzle was performed. The air blast nozzle was found to be more suitable due to its better performance over a wider operating range and that it is more resistant to erosion and abrasion. It was found that the maximum allowed droplet size of the pyrolysis oil spray should be about 50–70% of the droplet size for diesel fuel.

Development and Experimental Investigation of a Tubular Combustor for Pyrolysis Oil Burning

2014 ◽  
Vol 137 (3) ◽  
Author(s):  
Martin Beran ◽  
Lars-Uno Axelsson
Keyword(s):  
Experimental Investigation ◽  
Gas Turbine ◽  
Droplet Size ◽  
Gas Turbines ◽  
Alternative Fuels ◽  
Fossil Fuels ◽  
Heat Content ◽  
Pyrolysis Oil ◽  
Load Range ◽  
Air Blast

The growing demand for more economical and environmentally friendly power generation forces the industry to search for fuels that can replace the conventional fossil fuels. This has led to significant developments in the production of alternative fuels during the last years, which have made them a reliable and relatively efficient source of energy. One example of these alternative fuels is the pyrolysis oil. However, higher viscosity, lower heat content, limited chemical stability, and its ability to create sediment make pyrolysis oil challenging for gas turbines. The OPRA OP16 gas turbine is an all radial single-shaft gas turbine rated at 1.9 MW. The all radial design, together with the lack of intricate cooling geometries in the hot section, makes this gas turbine suitable for operation on these fuels. This paper presents an experimental investigation of pyrolysis oil combustion in a tubular combustor developed, especially for low-calorific fuels. The experiments have been performed in an atmospheric combustion test rig, and the results have been compared to the results obtained from ethanol and diesel combustion. It was found that it was possible to burn pure pyrolysis oil in the load range between 70% and 100% with a combustion efficiency exceeding 99% and without creation of sediments on the combustor inner wall. It was found that the NOx emissions were similar for pyrolysis oil and diesel, whereas the CO emissions were twice as high for pyrolysis oil. A comparison between the air blast nozzle and the pressure nozzle was performed. The air blast nozzle was found to be more suitable due to its better performance over a wider operating range and that it is more resistant to erosion and abrasion. It was found that the maximum allowed droplet size of the pyrolysis oil spray should be about 50–70% of the droplet size for diesel fuel.

scholarly journals Experimental study on counterintuitive behavior of thin aluminium plates under free airblast loading

2018 ◽  
Vol 183 ◽  
pp. 02059
Author(s):  
Zixi Xu ◽  
Yan Liu ◽  
Fenglei Huang
Keyword(s):  
Experimental Study ◽  
Experimental Investigation ◽  
Dimensionless Parameter ◽  
Permanent Deformation ◽  
Structural Response ◽  
Impulsive Loading ◽  
Special Focus ◽  
Air Blast ◽  
Free Air ◽  
Air Blast Loading

An experimental investigation of the counterintuitive behaviour in thin aluminium plates under fullfield test is presented in the paper. Special focus is placed on structural response and permanent deflection of the panels after the complex response. Thus, a series of tests with the plates varied in two kinds of thickness were conducted, where impulsive loading was generated by detonating the explosives at various standoff distances. As loaded impulsively, the vibration response was observed and the final configuration of each plate was measured and recreated. It is shown that all plates subjected to free air blast loading in such conditions exhibited plastic permanent deformation combined with distinct counterintuitive behaviour, as the plates deformed to the opposite direction of the incident wave. In addition, the characteristics of the permanent deflection can be divided into 2 typical deformation shapes, and the occurrences of which were correlated to the dimensionless parameter proposed in previous studies, confirmed to be an approximate indicator to describe the influence of loading conditions herein.

Experimental investigation on the performance of PVC foam core sandwich panels under air blast loading

2019 ◽  
Vol 226 ◽  
pp. 111081 ◽  
Author(s):  
Tianyu Zhou ◽  
Pan Zhang ◽  
Wei Xiao ◽  
Jun Liu ◽  
Yuansheng Cheng
Keyword(s):  
Experimental Investigation ◽  
Sandwich Panels ◽  
Blast Loading ◽  
Foam Core ◽  
Air Blast ◽  
Air Blast Loading

scholarly journals Experimental investigation on cellular breakup of a planar liquid sheet from an air-blast nozzle

2004 ◽  
Vol 16 (3) ◽  
pp. 625-632 ◽  
Author(s):  
Jaewan Park ◽  
Kang Y. Huh ◽  
Xianguo Li ◽  
Metin Renksizbulut
Keyword(s):  
Experimental Investigation ◽  
Liquid Sheet ◽  
Air Blast
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