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Hasil Pencarian

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cover
cover
Dimas Izuladha
"Laju penguapan pada droplets penting untuk diketahui dalam melakukan simulasi pada combustion. Yosuo Moriyoshi dan Yasuo Imai melakukan penelitian tentang pengukuran distribusi kosentrasi tekanan uap pada bahan bakar dalam phase gas dan liquid[9]. Christopher J. Rutland and Yunliang Wang melakukan simulasi
terhadap semprotan campuran cairan turbulen menggunakan software DNS[10]. Banyak simulasi combustion menggunakan software Fluent ataupun DNS yang menggunakan model analogi Ranz-Marshall pendekatan stagnan film sebagai dasar untuk menghitung laju perpindahan panas dan massa. Penelitian ini bertujuan untuk melihat apakah model analogi tersebut dapat digunakan pada premium dan pertamax yang memiliki bilangan lewis besar (3-4) serta membandingkan dengan model E. A. Kosasih [6].
Penelitian ini menggunakan alat berupa jarum yang berisi larutan. Setelah larutan diteteskan pada termokopel, kemudian dialirkan udara dengan kecepatan dan temperatur bervariasi. Setelah dianalisa akan didapat hubungan antara bilangan Reynold (Re), Prandtl (Pr), Schmidt (Sc), Nusselt (Nu) dan bilangan Sherwood (Sh). Model Modifikasi oleh E. A. Kosasih ternyata mempunyai korelasi yang lebih kuat dibandingkan dengan model film stagnan.

Evaporation rate on the droplets is important to note in doing simulation on combustion. Yosuo Imai Yasuo Moriyoshi and conducts research on measurement of concentration distribution in the fuel vapor pressure in the gas and liquid phase[9]. Christopher J. Rutland and Wang Yunliang simulation of Turbulent liquid spray mixing and combustion by using DNS software[10]. Many combustion simulation using FLUENT software or DNS which uses the analogy of Ranz-Marshall model of stagnant film approach as a basis for calculating the rate of heat and mass transfer. This study aimed to see whether the analogy model can be used on premium and pertamax which has a large Lewis numbers (3-4) and compare with model modification E.A Kosasih[6].
This research is using a nozzle filled with solution. After the solution is injected on thermocouple, then air flow is given with some velocity and temperature variations. After being analized, the relations between Reynold number (Re), Prandtl (Pr), Schmidt (Sc), Nusselt (Nu) and Sherwood number (Sh) will be found. The modification model E. A. Kosasih has stronger correlation than stagnant film model.
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2010
S630
UI - Skripsi Open  Universitas Indonesia Library
cover
Maurya, Rakesh Kumar
"This book deals with in-cylinder pressure measurement and its post-processing for combustion quality analysis of conventional and advanced reciprocating engines. It offers insight into knocking and combustion stability analysis techniques and algorithms in SI, CI, and LTC engines, and places special emphasis on the digital signal processing of in-cylinder pressure signal for online and offline applications. The text gives a detailed description on sensors for combustion measurement, data acquisition, and methods for estimation of performance and combustion parameters. The information provided in this book enhances readers basic knowledge of engine combustion diagnostics and serves as a comprehensive, ready reference for a broad audience including graduate students, course instructors, researchers, and practicing engineers in the automotive, oil and other industries concerned with internal combustion engines.
Maximizes readers understanding of the construction, working principles, installation, signal processing and limitations of the transducers used for combustion analysis;
Provides a range of different models for estimating heat release and heat transfer for combustion quality analysis;
Describes statistical and chaotic methods used for combustion stability analysis and the different knock indices and combustion noise metrics evaluated from cylinder pressure signal;
Reinforces concepts presented with end of chapter summary discussions and questions;
Explains methods used for estimation of engine parameters such as TDC, compression ratio, air-fuel ratio, residual gas fraction and wall temperature using in-cylinder pressure measurement."
Switzerland: Springer Nature, 2019
e20509892
eBooks  Universitas Indonesia Library