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It has been known from multi-zone simulations that HCCI combustion can be significantly affected by temperature stratification of the in-cylinder gas. With the same combustion timing (i.e., crank angles at 50% heat release, denoted as CA50), large temperature stratification tends to prolong the combustion duration and lower down the in-cylinder pressure-rise-rate. With low pressure-rise-rate HCCI

Recent experiments and numerical studies have showed that piston geometry has a significant effect on the homogeneous charge compression ignition (HCCI) process. There are two effects generated by the combustor geometry: the geometry affects the flow/turbulence in the cylinder; the geometry also affects the temperature stratification. The temperature stratification is more directly responsible for

The majority of the power production in the world today is based on combustion of coal, oil and natural gas. Most countries have agreed that the amount of CO2 emitted to the atmosphere will have to be decreased to keep the global warming at sustainable levels. One way of reducing the CO2 emitted to the atmosphere is by introducing hydrogen co-firing. The hydrogen may be produced from renewable so

Ribbed channel flows are encountered in numerous engineering applications to promote turbulence and enhance heat transfer in various cooling passages, e.g., in turbine blades and at combustor walls. Numerical simulations have become an increasingly useful tool for studying the behavior of fluids in rib-roughened channels to provide insights into the complex turbulence structures and flow separatio

A single zircon grain dated by ion probe with a minimum age of 3432±30 Ma was found in a microgranite dyke, which cuts norite of 916±11 Ma Hakefjorden Complex at Älgön on the Swedish west coast north of Gothenburg. Zircons are a rare accessory mineral in this dyke. They could be classified by morphology as orthocrysts and xenocrysts. Data from four orthocrysts show that the dyke originated between

HEERA MENON1,2, NICHOLAS PAUL MORGAN3, HOSSEIN JEDDI2,4,5, CRISPIN HETHERINGTON2,6, HÅKAN PETTERSSON2,4,5, ANNA FONTCUBERTA i MORRAL3, MATTIAS BORG1,2 E-mail: heera.menon@eit.lth.seElectrical and Information Technology, Lund University 1. Electrical and Information Technology, Lund University, Lund, Sweden 2. NanoLund, Lund University, Sweden 3. Laboratory of Semiconductor Materials, Ecole Polytec

https://www.nano.lu.se/sites/nano.lu.se/files/2021-10/Menon_Integration%20of%20single%20crystalline%20InSb%20on%20Si%20by%20rapid%20melt%20growth_Optimized.pdf - 2026-07-17

BANGLADESH NATIONAL LAW AND POLICY REPORT CONSULTATION DRAFT 2020 Displacement in the Context of Disasters and Climate Change Funded by This report was prepared by Md Abdul Awal Khan (Independent University Bangladesh) and Matthew Scott (RWI) 2020 TABLE OF CONTENTS 1 INTRODUCTION 1 1.1. A human rights-based approach 1 2 Displacement in Numbers 3 2.1. Number of disasters and people affected in the

https://rwi.lu.se/wp-content/uploads/2024/03/Consultation-Draft_Bangladesh.pdf - 2026-07-17

The Siemens gas turbine SGT-800 is the largest industrial gas turbine produced by Siemens Industrial Turbomachinery (SIT) offering a dry low emission (DLE) capability below 15 ppm NOx. It has a very high reliability using an annular combustor system with passive damping and 30 DLE burners. To obtain a greater understanding of the mixing process and the flame dynamics and in order to further reduce

The diagnostic techniques for simultaneous velocity and relative OH distribution, simultaneous temperature and relative OH distribution, and three component velocity mapping are described. The data extracted from the measurements include statistical moments for inflow fluid dynamics, temperature, conditional velocities, and scalar flux. The work is a first step in the development of a detailed lar

For environmental and human health reasons, the regulations on the emissions from combustion devices are getting more and more strict. In particular, it is important to abate the emission of pollutants deriving from combustion in gas turbines. A solution is the use of swirl stabilized, lean premixed combustion. Besides the beneficial effects, there are still some issues related to instabilities an