Motion Pictures of Engine Flames Correlated with Pressure Cards

Rassweiler, Gerald M.; Withrow, Lloyd

doi:10.4271/380139

Cited by 341 publications

(125 citation statements)

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“…Bunun temel nedeni, aslında deneysel sonuçlara dayanarak hesaplanan net ısı yayılımı değerlerinin de gerçekte bir modelleme ile belirlenmesidir. Bu çalışmada deneysel sonuçlara dayanarak hesaplanan net ısı yayılımının modellenmesinde Rassweiler -Withrow [33] metodu kullanılmıştır. …”

Section: Model Ve Deney Sonuçlarinin Karşilaştirilmasi (Comparation Ounclassified

Homojen Karışımlı Sıkıştırma Ateşlemeli (HCCI) Bir Motorun Tek Bölgeli Modelleme Yöntemi Kullanılarak Analizi

Yaşar¹

2016

SAUFenBilDer

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ÖZHCCI motorların modellenmesinde sıfır-boyutlu modeller yaygın olarak kullanılmaktadır. Bu modeller tek veya çok bölge içerebilirler. Bununla birlikte, en basit yaklaşım yanmış ve yanmamış gazı içeren tek bölge yaklaşımıdır. Bu tip sıfır-boyutlu modellerde yanma olayı Wiebe fonksiyonu ile modellenmektedir. Bu makalede, HCCI prensibine göre çalışan tek silindirli bir Ricardo Hydra motoru tek bölge yaklaşımı kullanılarak modellenmiştir. Analiz çalışmalarında SPICE (Simulated Petrol Internal Combustion Engine) yazılımının modifiye edilmiş bir versiyonu olan TRICE yazılımı kullanılmıştır. Yanma analizlerinde, HCCI yanma modellerinde standart Wiebe fonksiyonu kullanımının maksimum silindir basıncının yüksek olarak tahmin edilmesi sonucunu doğurması nedeniyle, standart Wiebe fonksiyonunun modifiye edilmiş bir şekli olan Double-Wiebe fonksiyonu kullanılmıştır. Analizler, n-Heptan-Toluen karışımı için üç hava fazlalık katsayısı değerinde gerçekleştirilmiş ve elde edilen sonuçlar bir Avrupa Komisyonu Marie Curie destek programı (FP-6) projesi kapsamında Shell Araştırma Merkezine ait motor test laboratuvarında ölçülen deneysel verilerle karşılaştırılmıştır.Anahtar Kelimeler: HCCI motor, tek-bölgeli modelleme, net ısı yayılımı, dilindir basıncı Analysis of a Homogeneous Charge Compression Ignition (HCCI) engineby using a single-zone modelling method ABSTRACT Zero-dimensional models are commonly used to model HCCI engines. These models may contain single or multi zones. However, the simplest approach is the single-zone containing burned and unburned gases. In these type models, combustion progress is modelled by Wiebe function. In this article, a single-cylinder Ricardo Hydra engine, which is running in HCCI mode, was modelled by using single-zone method. In the analysis, a modified Shell SI engine code called TRICE was used. This code is a modified version of SPICE (Simulated Petrol Internal Combustion Engine) and modified for HCCI engine. In the combustion analysis, a modified Wiebe function called double-Wiebe function was used since standard Wiebe-function tends to over-predict the peak cylinder pressure in HCCI combustion models. The analses were performed for n-Heptane-Toluene blend with three excess air ratios and the results were compared to the experimental data measured in the engine test laboratuary of Shell Research Centre within an European Commission Marie Curie Transfer of Knowledge Scheme (FP6) project.

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Section: Model Ve Deney Sonuçlarinin Karşilaştirilmasi (Comparation Ounclassified

Homojen Karışımlı Sıkıştırma Ateşlemeli (HCCI) Bir Motorun Tek Bölgeli Modelleme Yöntemi Kullanılarak Analizi

Yaşar¹

2016

SAUFenBilDer

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“…the process of transforming the chemical energy in the fuel into heat, evolves over time. There exist numerous methods for estimation of burned mass fraction, the first introduced in Rassweiler and Withrow (1938). Another approach, taken here, is to base the burned mass fraction estimation on the first law of thermodynamics using a single-zone heat release model similar to the one described in Gatowski et al (1984).…”

Section: Burned Mass Fraction Calculation and Cylinder Pressure Simulmentioning

confidence: 99%

Estimation of Combustion Phasing Using the Combustion Net Torque Method*

Thor

Egardt

McKelvey

et al. 2011

IFAC Proceedings Volumes

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A new and computationally efficient method, called the combustion net torque method, for estimating combustion phasing in an internal combustion engine using crankshaft torque data is presented. The work is motivated by the need of such an estimation method for real-time implementation of a torque based closed-loop combustion phasing control system. The ideal properties of the proposed method, based on torque calculated from cylinder pressure, are studied using simulations and experimental data from both a spark ignited and a compression ignited engine. A relation to 50% burned mass fraction, the most common measure of combustion phasing, is established and the robustness of the method is investigated. The results show that the ideal estimation accuracy of the proposed method is high, especially around the combustion phasing position where maximum engine efficiency is achieved. Also, the computational complexity of the combustion net torque method is significantly lower compared to other existing techniques for torque domain combustion phasing estimation.

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“…In order to observe the impact of the oxygenated blends on combustion and heat release, the combustion chamber of Cylinder # 1 of the engine was fitted with a Kistler [110]. The methods assess burn rate from measured pressure data by estimating the apparent pressure rise as a result of combustion.…”

Section: Pressure Trace Analysismentioning

confidence: 99%

Dimethyl Ether (Dme)-Fueled Shuttle Bus Demonstration Project

Chapman¹,

Bhide²,

Stefanik³

et al. 2003

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Several oxygenates have been proposed and tested for use with or as diesel fuel. This paper examines two such oxygenates, CETANER TM and dimethyl ether (DME), partially or wholly produced by Air Products and Chemicals, Inc's Liquid Phase Technology. In previous studies on a single cylinder compression ignition engine and a Volkswagen TDI four cylinder engine, significant reductions in particulate matter emissions were observed with blends of CETANER TM in diesel fuel. In this study, experiments were performed on a multicylinder Navistar 7.3L Turbodiesel engine confirmed and extended the observations from the earlier studies. This is an important step in not only showing that the fuel does perform on each type of engine in similar fashion, but also in showing that DME and its derivatives can give consistent, significant results in lowering emissions. The oxygenated fuels were blended to achieve a net addition of 2 wt.% oxygen in the blended fuel. A pressurized fueling system was developed to deliver mixtures of DME-diesel at up to 1 MPa (150 psi). With the DME-diesel blend, less consistent emissions results were obtained owing to an inability to sufficiently the fuel in the rail.

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Motion Pictures of Engine Flames Correlated with Pressure Cards

Cited by 341 publications

References 0 publications

Homojen Karışımlı Sıkıştırma Ateşlemeli (HCCI) Bir Motorun Tek Bölgeli Modelleme Yöntemi Kullanılarak Analizi

Homojen Karışımlı Sıkıştırma Ateşlemeli (HCCI) Bir Motorun Tek Bölgeli Modelleme Yöntemi Kullanılarak Analizi

Estimation of Combustion Phasing Using the Combustion Net Torque Method*

Dimethyl Ether (Dme)-Fueled Shuttle Bus Demonstration Project

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