A5004736271- Advanced Combustion Engine Technologies
- Combustion and flame dynamics
- Vehicle emissions and performance
- Flood Risk Assessment and Management
- Hydrology and Watershed Management Studies
- Combustion and Detonation Processes
- Hydrological Forecasting Using AI
- Catalytic Processes in Materials Science
- Groundwater flow and contamination studies
- Heat transfer and supercritical fluids
- Hydrology and Drought Analysis
- Biodiesel Production and Applications
- Reservoir Engineering and Simulation Methods
- Extraction and Separation Processes
- Engine and Fuel Emissions
- Advanced Aircraft Design and Technologies
- Real-time simulation and control systems
- Water Resource Management and Quality
- Vehicle Dynamics and Control Systems
- Infrastructure Resilience and Vulnerability Analysis
Brandenburg University of Technology Cottbus-Senftenberg
2018-2023
Siemens (Germany)
2020-2021
University of Cundinamarca
2016
International Marine and Dredging Consultants
2016
This work presents the assessment of direct water injection in spark-ignition engines using single cylinder experiments and tabulated chemistry-based simulations. In addition, is compared with cooled low-pressure exhaust gas recirculation at full load operation. The analysis two knock suppressing cooling methods performed quasi-dimensional stochastic reactor model a novel dual fuel chemistry model. To evaluate characteristics autoignition end gas, detonation diagram developed by Bradley...
Today numerical models are a major part of the diesel engine development. They applied during several stages development process to perform extensive parameter studies and investigate flow combustion phenomena in detail. The divided by complexity computational costs since one has decide what best choice for task is. 0D suitable problems with large spaces multiple operating points, e.g. map simulation sweeps. Therefore, it is necessary incorporate physical improve predictive capability these...
Water injection is investigated for turbocharged spark-ignition engines to reduce knock probability and enable higher engine efficiency. The novel approach of this work the development a simulation-based optimization process combining advantages detailed chemistry, stochastic reactor model genetic assess water injection. fast running quasi-dimensional with tabulated chemistry accounts effects on laminar flame speed combustion chemistry. coupled Non-dominated Sorting Genetic Algorithm find an...
The use of chemical kinetic mechanisms in computer aided engineering tools for internal combustion engine simulations is high importance studying and predicting pollutant formation conventional alternative fuels. However, usage complex reaction schemes accompanied by computational cost 0-D, 1-D 3-D fluid dynamics frameworks. present work aims to address this challenge allow broader deployment detailed chemistry-based simulations, such as multi-objective optimization campaigns. A fast-running...
A novel 0-D Probability Density Function (PDF) based approach for the modelling of Diesel combustion using tabulated chemistry is presented. The Direct Injection Stochastic Reactor Model (DI-SRM) by Pasternak et al. has been extended with a progress variable framework allowing use pre-calculated auto-ignition table. Auto-ignition through adiabatic constant pressure reactor calculations. implementation assessed against previously presented DI-SRM version where chemical reactions are solved...
The increasing requirements to further reduce pollutant emissions, particularly with regard the upcoming Euro 7 (EU7) legislation, cause technical and economic challenges for development of internal combustion engines. All emission reduction technologies lead an complexity not only hardware, but also control functions be deployed in engine units (ECUs). Virtualization has become a necessity process order able handle complexity. virtual calibration ECUs using hardware-in-the-loop (HiL)...
Abstract. This paper presents the results of 2022 Groundwater Time Series Modelling Challenge, where 15 teams from different institutes applied various data-driven models to simulate hydraulic-head time series at four monitoring wells. Three wells were located in Europe and one was USA hydrogeological settings temperate, continental, or subarctic climates. Participants provided with approximately years measured heads (almost) regular intervals daily measurements weather data starting some 10...
<div class="section abstract"><div class="htmlview paragraph">During cold start of natural gas engines, increased methane and formaldehyde emissions can be released due to flame quenching on cylinder walls, misfiring the catalyst not being fully active at low temperatures. Euro 6 legislation does regulate emissions. New limits for these two pollutants have been proposed by CLOVE consortium 7 scenarios. These proposals indicate tougher requirements aftertreatment systems...
<div class="section abstract"><div class="htmlview paragraph">In contrast to the currently primarily used liquid fuels (diesel and gasoline), methane (CH<sub>4</sub>) as a fuel offers high potential for significant reduction of greenhouse gas emissions (GHG). This advantage can only be if tailpipe CH<sub>4</sub> are reduced minimum, since GHG impact in atmosphere is higher than that carbon dioxide (CO<sub>2</sub>). Three-way catalysts (TWC -...
<div class="section abstract"><div class="htmlview paragraph">Water injection can be applied to spark ignited gasoline engines increase the Knock Limit Spark Advance and improve thermal efficiency. The potential of 6 <i>°CA</i> 11 is shown by many research groups for EN228 fuel using experimental simulation methods. influence water multi-layered since it reduces in-cylinder temperature vaporization higher heat capacity fresh gas, changes chemical equilibrium in end...
The prediction of local heat transfer and thermal stratification in the zero-dimensional stochastic reactor model is compared to direct numerical simulation published by Schmitt et al. 2015. Direct solves Navier–Stokes equations without incorporating assumptions for turbulence wall transfer. Therefore, it can be considered as experiment suitable validate approximations low-dimensional models. incorporates a modified version Euclidean Minimum Spanning Tree mixing proposed Subramaniam 1998. To...
This article presents a web-based tool for operational decision making and water management planning. The was designed implemented to address the modelling stakeholder's needs of Bogotá river basin. In general, system is composed by two entities: backend frontend, which are loosely coupled an API. incorporates management, processing storage data. Within this component data will flow through set modules, such as: routines, models multi criteria analysis module. Moreover, steers exiting...
Abstract. This paper presents the results of 2022 groundwater time series modeling challenge, where 15 teams from different institutes applied various data-driven models to simulate hydraulic head at four monitoring wells. Three wells were located in Europe and one USA, hydrogeological settings but all temperate or continental climates. Participants provided with approximately years measured heads (almost) regular intervals daily measurements weather data starting some 10 prior first...
Team DA CollectiveThe "DA Collective" team used an ensemble-of-transfer-function-models approach.The Pastas python module (Collenteur et al., 2019) was as the underlying transfer-function model engine and wrapped within ensemble-based data assimilation framework.The captured input parameter uncertainty well temporally-varying forcing uncertainty.The in Julian day multiplier parameters that were then transferred to forecast period so any biases learned during training could be propagated...
<div class="section abstract"><div class="htmlview paragraph">In more or less all aspects of life and in sectors, there is a generalized global demand to reduce greenhouse gas (GHG) emissions, leading the tightening expansion existing emissions regulations. Currently, non-road engines manufacturers are facing updates such as, among others, US Tier 5 (2028), European Stage V (2019/2020), China Non-Road IV (in phases between 2023 2026). For on-road applications, Euro VII (2025), VI...