Measuring and comparing the ignition delay time of the reference diesel, convectional diesel, additive ethanol and biodiesel from soybean oil using a shock tube
| Autor: | Helder Alves de Almeida Junior, Juan Canellas Bosch Neto, Claudio Marcio Santana, José Eduardo Mautone Barros, Jorgimara de Oliveira Braga |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Shock wave
0209 industrial biotechnology Biodiesel Materials science food.ingredient Mechanical Engineering Applied Mathematics General Engineering Aerospace Engineering 02 engineering and technology Mechanics complex mixtures Pressure sensor Industrial and Manufacturing Engineering Soybean oil law.invention Ignition system Diesel fuel 020901 industrial engineering & automation food law Automotive Engineering Physics::Chemical Physics Shock tube Cetane number |
| Zdroj: | Journal of the Brazilian Society of Mechanical Sciences and Engineering. 42 |
| ISSN: | 1806-3691 1678-5878 |
| Popis: | The objective of this work is to correlate the ignition delay times of reference diesel, convectional diesel, ethanol and biodiesel from soybean oil measured in a shock tube with a 5% additive increase in the cetane number. The results were correlated with the cetane number of the respective fuels and compared with the ignition delay times available in the studies by others authors. The shock tube is a metal tube in which gas at low pressure and at high pressure is separated by a diaphragm. When the diaphragm breaks in predetermined conditions (high pressure in this case) produces shock waves that move from the high-pressure chamber (known driver section) to the low-pressure chamber (known driven section). The tests were performed under the following initial conditions: reflected shock wave temperature from 903 to 1260 K, equivalence ratio of 1 and reflected shock wave pressures of 24 bar. For determining and recording the ignition delay time, pressure sensors with high acquisition rate and luminosity sensors were used. With information from pressure sensors and the luminosity sensor, ignition delay times of reference diesel, convectional diesel, additive ethanol and biodiesel from soybean oil were recorded. We concluded that the ignition delay time of additive ethanol was twice as large as the ignition delay time of reference diesel. The ignition delay time of biodiesel from soybean oil was approximately three times greater than the ignition delay time of reference diesel. The ignition delay time of the reference diesel was smaller than the convectional diesel. The contribution of this work is that it shows why additive ethanol and pure biodiesel should not be used as substitutes for diesel compression ignition engines without any major changes in the engines. The ignition delay times of these fuels are at least two to three times longer than the ignition delay time of reference diesel. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink