Yazar "Dogu, Yahya" için listeleme
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1-D Modelling Comparative Study to Evaluate Performance and Emissions of a Spark Ignition Engine Fuelled with Gasoline and LNG
Yontar, Ahmet Alper; Dogu, Yahya (E D P Sciences, 2016)In this study, a spark-ignition engine fuelled with gasoline and LNG was modelled in 1-D at wide open throttle by using Ricardo-Wave software. Different engine speeds ranging from 1500rpm to 4500rpm with an increment of ... -
Brush seal temperature distribution analysis (conferenceObject)
Dogu, Yahya; Aksit, Mahmut F. (Amer Soc Mechanical Engineers, 2005)Brush seals are designed to survive transient rotor rubs. Inherent brush seal flexibility reduces frictional heat generation. However, high surface speeds combined with thin rotor sections may result in local hot spots. ... -
CFD Investigation of Brush Seal Leakage Performance Depending on Geometric Dimensions and Operating Conditions
Dogu, Yahya; Sertçakan, Mustafa C.; Bahar, Ahmet S.; Pişkin, Altuğ; Arıcan, Ercan; Kocagül, Mustafa (Amer Soc Mechanical Engineers, 2015)Brush seals require custom design and tailoring due to their behavior driven by flow dynamic, which has many interacting design parameters, as well as their location in challenging regions of turbomachinery. Therefore, ... -
CFD Investigation of Labyrinth Seal Leakage Performance Depending on Mushroom Shaped Tooth Wear
Dogu, Yahya; Sertçakan, Mustafa C.; Bahar, Ahmet S.; Piskin, Altuğ; Arıcan, Ercan; Kocagül, Mustafa (Amer Soc Mechanical Engineers, 2015)Conventional labyrinth seal applications in turbomachinery encounter a permanent teeth tip damage and wear during transitional operations. This is the dominant issue that causes unpredictable seal leakage performance ... -
Computational Fluid Dynamics Investigation of Brush Seal Leakage Performance Depending on Geometric Dimensions and Operating Conditions
Dogu, Yahya; Bahar, Ahmet S.; Sertcakan, Mustafa C.; Piskin, Altug; Arican, Ercan; Kocagul, Mustafa (Asme, 2016)Brush seals require custom design and tailoring due to their behavior driven by flow dynamic, which has many interacting design parameters, as well as their location in challenging regions of turbomachinery. Therefore, ... -
Computational Fluid Dynamics Investigation of Labyrinth Seal Leakage Performance Depending on Mushroom-Shaped Tooth Wear
Dogu, Yahya; Sertcakan, Mustafa C.; Bahar, Ahmet S.; Piskin, Altug; Arican, Ercan; Kocagul, Mustafa (Asme, 2016)Conventional labyrinth seal applications in turbomachinery encounter a permanent teeth tip damage and wear during transitional operations. This is the dominant issue that causes unpredictable seal leakage performance ... -
Design And Cfd Analysis Of A 150 Kw 8-Stage Orc-Rot (Organic Rankine Cycle - Radial Outflow Turbine) And Performance Degradation Due To Blade Tip Clearance Of Labyrinth Seal
Dogu, Yahya; Gunaydin, Ibrahim; Kilicaslan, Zeynal; Ileri, Tacettin; Soganci, Sinan (Amer Soc Mechanical Engineers, 2018)In this study, blade tip leakages were calculated for a Radial Outflow Turbine (ROT) designed for an Organic Rankine Cycle (ORC) at a 150kW power output. Since the turbine blade sizes are relatively very small for low-capacity ... -
Evaluation of flow behavior for clearance brush seals
Dogu, Yahya; Aksit, Mahmut F.; Demiroglu, Mehmet; Dinc, Osman Saim (Asme-Amer Soc Mechanical Eng, 2008)The industrial applications of brush seals have been increasing due to their superior sealing performance. Advances in the understanding of seal behavior have been pushing the design limits to higher-pressure load, ... -
Experimental investigation of effects of single and mixed alternative fuels (gasoline, CNG, LPG, acetone, naphthalene, and boron derivatives) on a commercial i-DSI engine
Dogu, Yahya; Yontar, Ahmet Alper; Kantaroglu, Emrah (TAYLOR & FRANCIS INC, 2020)A commercial i-DSI (Intelligent-Dual Sequential Ignition) engine is tested to investigate performance and emissions for single fuels and alternative fuels mixed into gasoline. The novelty of the study is the first time ... -
Flow Resistance Coefficients of Porous Brush Seal as a Function of Pressure Load
Dogu, Yahya; Sertcakan, Mustafa C.; Gezer, Koray; Kocagul, Mustafa (Asme, 2018)Developments in brush seal analyses tools have been covering advanced flow and structural analyses since brush seals are applied at elevated pressure loads, temperatures, surface speeds, and transients. Brush seals have ... -
Investigation of ignition advance effects for CNG usage in a sequential dual ignition gasoline engine by using in-cylinder combustion cfd analysis
Yontar, Ahmet Alper; Dogu, Yahya (Gazi Univ, Fac Engineering Architecture, 2019)In this study; for a sequential dual ignition gasoline engine, the effects of ignition advance on engine characteristics and in-cylinder flame propagation have been numerically investigated for CNG usage with an in-cylinder ... -
Investigation of the effects of gasoline and CNG fuels on a dual sequential ignition engine at low and high load conditions
Yontar, Ahmet Alper; Dogu, Yahya (Elsevier Sci Ltd, 2018)In this study, a dual sequential spark ignition engine is separately tested either with gasoline or CNG at low and high loads. In addition, numerical engine analyses are performed by constructing a 1-D engine model in ... -
Labyrinth Seal Leakage Degradation Due to Various Types of Wear
Dogu, Yahya; Sertcakan, Mustafa C.; Gezer, Koray; Kocagul, Mustafa; Arican, Ercan; Ozmusul, Murat S. (Asme, 2017)This paper systematically presents a complete leakage comparison for various types of wear experienced by labyrinth seals. Labyrinth seals used in turbine engines are designed to work at a clearance during steady-state ... -
Labyrinth Seal Leakage Degradation Due to Various Types of Wear (conferenceObject)
Dogu, Yahya; Sertcakan, Mustafa C.; Gezer, Koray; Kocagul, Mustafa; Arican, Ercan; Ozmusul, Murat S. (Amer Soc Mechanical Engineers, 2016)This paper systematically presents a complete leakage comparison for various types of wear experienced by labyrinth seals. Labyrinth seals used in turbine engines are designed to work at a clearance during steady-state ... -
Leakage Degradation of Straight Labyrinth Seal Due to Wear of Round Tooth Tip and Acute Trapezoidal Rub-Groove
Dogu, Yahya; Sertcakan, Mustafa C.; Gezer, Koray; Kocagul, Mustafa; Arican, Ercan; Ozmusul, Murat S. (Asme, 2017)In this paper, labyrinth seal leakage is numerically quantified for an acute trapezoidal rubgroove accompanied with a rounded tooth, as a function of rub-groove sizes and toothgroove axial positions. Analyses parameters ... -
Leakage Degradation of Straight Labyrinth Seal Due to Wear of Round Tooth Tip and Acute Trapezoidal Rub-Groove (conferenceObject)
Dogu, Yahya; Sertcakan, Mustafa C.; Gezer, Koray; Kocagul, Mustafa; Arican, Ercan; Ozmusul, Murat S. (Amer Soc Mechanical Engineers, 2016)In this paper, labyrinth seal leakage is numerically quantified for an acute trapezoidal rub-groove accompanied with a rounded tooth, as a function of rub-groove sizes and tooth-groove axial positions. Analyses parameters ... -
A Study of Cloth Seal Leakage Performance Based on Geometry and Pressure Load
Gorgun, Erdem; Aksit, Mahmut Faruk; Dogu, Yahya (MDPI, 2020)Metal cloth seals have been used increasingly in gas turbines due to their flexibility and superior leakage performance. Leakage performance of a metal cloth seal depends on operating conditions, slot and geometric dimensions. ...
