Correlation of Air Charge Temperature and Ignition Delay for Several Fuels in a Diesel Engine

Henein, Naeim A.; Bolt, Jay A.

doi:10.4271/690252

Cited by 46 publications

(10 citation statements)

References 12 publications

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“…All research ers agree on the start of injection (SOI) as the start of ID. However, several criteria have been used to define the end of ID or the start of combustion (SOC) [24][25][26][27][28][29][30][31][32]. In the current investiga tion, the definition of ID specified in ASTM D6890 [2] was used as shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

Effect of Cetane Improver on Autoignition Characteristics of Low Cetane Sasol IPK Using Ignition Quality Tester1

Zheng

Badawy

Henein

et al. 2014

Journal of Engineering for Gas Turbines and Power

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This paper investigates the effect of a cetane improver on the autoignition characteristics of Sasol IPK in the combustion chamber of the ignition quality tester (IQT). The fuel tested was Sasol IPK with a derived cetane number (DCN) of 31, treated with different percentages ofLubrizol 8090 cetane improver ranging from 0.1 to 0.4%. Tests were con ducted under steady state conditions at a constant charging pressure of 21 bar. The charge air temperature before fuel injection varied from 778 to 848 K. Accordingly, all the tests were conducted under a constant charge density. The rate of heat release was calculated and analyzed in detail, particularly during the autoignition period. In addi tion, the physical and chemical delay periods were determined by comparing the results o f two tests. The first was conducted with fuel injection into air according to ASTM stand ards where combustion occurred. In the second test, the fuel was injected into the cham ber charged with nitrogen. The physical delay is defined as the period of time from start o f injection (SOI) to point of inflection (POI), and the chemical delay is defined as the pe riod of time from POI to start of combustion (SOC). Both the physical and chemical delay periods were determined under different charge temperatures. The cetane improver was found to have an effect only on the chemical ID period. In addition, the effect of the ce tane improver on the apparent activation energy of the global combustion reactions was determined. The results showed a linear drop in the apparent activation energy with the increase in the percentage of the cetane improver. Moreover, the low temperature (LT) regimes were investigated and found to be presented in base fuel, as well as cetane improver treated fuels.

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Section: Methodsmentioning

confidence: 99%

Effect of Cetane Improver on Autoignition Characteristics of Low Cetane Sasol IPK Using Ignition Quality Tester1

Zheng

Badawy

Henein

et al. 2014

Journal of Engineering for Gas Turbines and Power

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“…Tenggang waktu dari periode injeksi solar sampai terjadinya titik api yang mula-mula disebut ignition delay. Ignition delay adalah suatu parameter yang sangat mempengaruhi dari awal sampai akhir proses pembakaran di dalam silinder mesin diesel, oleh sebab itu sangat mempengaruhi performa dan emisi gas buang mesin, sehingga dari dahulu telah banyak penelitian [1][2][3][4][5][6][7][8][9][10][11] dilakukan. Dewasa ini, telah banyak riset terhadap mesin diesel berbahan bakar ganda, yang memungkinkan bahan bakar gas (BBG), seperti; Liquified Petroleum Gas, Compressed Natural Gas, dan lain-lain, dipakai sebagai bahan bakar utama [12][13][14][15][16][17].…”

Section: Pendahuluanunclassified

Prediksi Ignition Delay Mesin Diesel Berbahan Bakar Ganda

Siagian¹,

Silaban²

2013

jtm

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ABSTRAKPada mesin diesel ada tenggang waktu antara sejak dimulainya penginjeksian solar (periode injeksi) ke dalam silinder bakar mesin, kemudian terbentuk campuran udara+embun solar sampai terjadi titik api yang mula-mula atau periode pengapian. Tenggang waktu atau keterlambatan pengapian ini disebut ignition delay. Ignition delay adalah suatu parameter yang sangat berpengaruh terhadap awal sampai akhir proses pembakaran di dalam silinder bakar mesin, oleh sebab itu sangat menentukan performa dan emisi gas buang mesin. Pada pengujian di sini, sebagai mesin berbahan bakar ganda.Bahan Bakar Gas (BBG), yaitu; propana, metana, dan hidrogen masing-masing dialirkan ke dalam silinder bakar mesin diesel konvensional, setelah bercampur dengan udara oleh sebuah mixer yang ditempatkan di dalam intake port. Kemudian bahan bakar solar disemprotkan langsung ke dalam silinder mesin dengan jumlah kecil (hanya sebagai pemicu api saja), dan ignition delay solar yang diinjeksikan tersebut dengan periode injeksi yang bervariasi dianalisis dan dievaluasi. Pada penelitian ini telah dilakukan dan ditemukan model perhitungan untuk memprediksi ignition delay, yaitu dengan menerapkan persyaratan autoignition Livengood-Wu (Livengood dan Wu, 1955). Dengan didapatkannya model perhitungan untuk memprediksi ignition delay ini maka diharapkan dapat mempermudah dan meningkatkan akurasi hasil yang didapat di dalam penelitian pada level simulasi khususnya pada bidang mesin diesel.Kata kunci: Keterlambatan pengapian, periode injeksi, periode pengapian, prediksi, bahan bakar ganda. Livengood-Wu (Livengood and Wu, 1955 ABSTRACT In diesel engines there is the lag time between injection of diesel fuel since the beginning (injection period) into the cylinder combustion engine, then formed a mixture of air +moisture diesel until there is a point which first fire or ignition period. The grace period or ignition delay is called the ignition delay. Ignition delay is a parameter that greatly affects the beginning to the end of the process of fuel combustion in the engine cylinder and therefore determine the performance and engine exhaust emissions. In testing here, as a dual-fuel engines, fuel gas, namely propane, methane, and hydrogen respectively supplied to the cylinder combustion conventional diesel engines, after mixing with air by a mixer placed in the intake ports. Then the diesel fuel is sprayed directly into the cylinder machine with a small amount (just as the trigger fires only), and the ignition delay of diesel fuel is injected with variable injection period is analyzed and evaluated. In this study has been carried out and found the model calculations to predict the ignition delay, ie by applying the requirements of auto ignition PENDAHULUANPada mesin diesel ada tenggang waktu antara sejak dimulainya penginjeksian solar (periode injeksi), kemudian meningkatnya tekanan dan temperatur sampai batas tertentu akibat gerakan menekan dari piston maka campuran udara + solar di dalam ruang bakar mesin mengalami terjadinya titik api yang mula-mula sehin...

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Section: Methodsmentioning

confidence: 99%

“…(3) It should be noted that the activation energies calculated from Figure 14 do not represent elementary chemical reactions but rather a large number of known, unknown, simple and complex chemical reactions that occur during the autoignition process [42]. The apparent activation energies, Ea, of different fuels calculated from Figure 14 are given in Table 4.…”

Section: Arrhenius Plot and Apparent Activation Energymentioning

confidence: 99%

Effect of Cetane Improver on Autoignition Characteristics of Low Cetane Sasol IPK Using Ignition Quality Tester (IQT)

Zheng

Badawy

Henein

et al. 2013

Volume 2: Fuels; Numerical Simulation; Engine Design, Lubrication, and Applications

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This paper investigates the effect of a cetane improver on the autoignition characteristics of Sasol IPK in the combustion chamber of the Ignition Quality Tester (IQT). The fuel tested was Sasol IPK with a Derived Cetane Number (DCN) of 31, treated with different percentages of Lubrizol 8090 cetane improver ranging from 0.1% to 0.4%. Tests were conducted under steady state conditions at a constant charging pressure of 21 bar. The charge air temperature before fuel injection varied from 778 to 848 K. Accordingly, all the tests were conducted under a constant charge density. The rate of heat release was calculated and analyzed in details, particularly during the autoignition period.In addition, the physical and chemical delay periods were determined by comparing the results of two tests. The first was conducted with fuel injection into air according to ASTM standards where combustion occurred. In the second test, the fuel was injected into the chamber charged with nitrogen. The physical delay is defined as the period of time from start of injection (SOI) to point of inflection (POI), and the chemical delay is defined as the period of time from POI to start of combustion (SOC). Both the physical and chemical delay periods were determined under different charge temperatures. The cetane improver was found to have an effect only on the chemical ID period. In addition, the effect of the cetane improver on the apparent activation energy of the global combustion reactions was determined. The results showed a linear drop in the apparent activation energy with the increase in the percentage of the cetane improver. Moreover, the low temperature (LT) regimes were investigated and found to be presented in base fuel, as well as cetane improver treated fuels.

show abstract

Correlation of Air Charge Temperature and Ignition Delay for Several Fuels in a Diesel Engine

Cited by 46 publications

References 12 publications

Effect of Cetane Improver on Autoignition Characteristics of Low Cetane Sasol IPK Using Ignition Quality Tester1

Effect of Cetane Improver on Autoignition Characteristics of Low Cetane Sasol IPK Using Ignition Quality Tester1

Prediksi Ignition Delay Mesin Diesel Berbahan Bakar Ganda

Effect of Cetane Improver on Autoignition Characteristics of Low Cetane Sasol IPK Using Ignition Quality Tester (IQT)

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