Spherically expanding flame propagations have been employed to measure speeds for H2/CH4/air mixtures over a wide range of H2 fractions (30 %, 50 70 and 100 % hydrogen by volume), at initial temperatures 303 K 360 K, pressures 0.1, 0.5 1.0 MPa. The equivalence ratio (ϕ) was varied from 2.5 pure 0.8 1.2 methane/hydrogen mixtures. Experimental laminar burning velocities Markstein numbers methane/hydrogen/air high pressures, which are crucial gas turbine applications, very rare in the...

Abstract The impingement cooling for a modern gas turbine component, either combustor liner or high-pressure blade, is often not as efficient required due to strong cross-flow effect and coolant maldistribution. This paper reports novel multi-stage scheme effectively use the minimize effect. design concept general working mechanism are introduced in this Part I paper. extra flexibilities optimization strategies reported II. Numerical simulations on conjugate heat transfer (CHT) were carried...

A well test analysis model for fractured and vuggy carbonate reservoir of wells drilling in large scale cave considering wellbore storage skin factor is established this paper. The Laplace transformation Stehfest numerical inversion are applied to obtain the results pressure. Through sensitivity different parameters typical curves, it found that change curves accordance with theoretical analysis. With increase factor, hump steeper. ratio influences depth width concave pressure derivative...

Atmospheric and high pressure rig tests were conducted to investigate the feasibility of using biodiesel as an alternative fuel power industrial gas turbines in one world’s leading dry low emissions (DLE) combustion systems, SGT-100. At same conditions, also carried out for mineral diesel provide reference information evaluate fuel. In atmospheric tests, likelihood machine lighting was identified based on measured probability ignition a single combustor. Lean extinction limits at various air...

The convective heat transfer and flow resistance properties of water flowing through a twisted trilobed tube (TTT) with Reynolds numbers that ranged from 10,000 to 40,000 were examined in this work. Specifically, we how the tip circle radius (r), straight length (l), transition (R), twist pitch (S) influenced tube. Our results showed TTT had an average Nusselt number (Nu) was 30% higher than plain tube, while friction coefficient (f) increased by 39%. We also presented temperature velocity...

Twisted tri-lobed tubes have garnered attention due to their exceptional heat transfer efficiency and straightforward fabrication. Existing literature lacks comprehensive assessments of the overall performance twisted from perspective energy loss irreversibility. This research aims investigate entropy generation during turbulent water flow within tubes, examining influence geometric parameters on local average production. Findings indicate that larger small circle radius (r) straight lengths...

The use of an innovative, intelligent control algorithm applied to the Siemens SGT-300 DLE engine is described. ensures stable operation and minimises emissions over a wide variation in fuel composition. 8MW class gas turbine has been at University New Hampshire (USA) since 2006. As well as operating on natural or diesel, also operates processed from landfill. These gases have variable Wobbe Index (WI) covering range 29.7 49 MJ/m3. No modifications required standard combustion hardware....

The conversion of lignocellulosic biomass into fine chemicals and polymers has been gaining attention recently. Regenerated lignocellulose beads (RLBs) were prepared by an emulsification/precipitation technique, using wheat straw as a raw material [Bmim]Cl solvent. morphology properties the obtained characterized. RLBs perfectly spherical, with porous microstructure, had huge specific surface area (142.4 m2/g). Their components similar to that straw; however some chemical crystal changes...

The influence of changes in fuel composition and heating value on the performance an industrial gas turbine combustor was investigated. tested a single cannular for Siemens SGT-400 13.4 MW dry low emission (DLE) engine. Ignition, engine starting, emissions, combustion dynamics flash back through burner metal temperature monitoring were among parameters investigated to evaluate impact flexibility performance. Lean ignition extinction limits measured three fuels with different heat values term...

Ammonia, a hydrogen carrier that emits no carbon and benefits from well-established infrastructure for production, storage, transport, making it an favored clean fuel. This paper introduces the first exploration analysis of Direct Ammonia fueled Solid Oxide Fuel Cell Gas Turbine system with Dual-Loop Organic Rankine Cycle (DA-SOFC-GT-ORC). We performed multi-objective optimization this system, emphasis on enhancing both efficiency economic feasibility. Under optimized conditions, realizes...

Soil visible and near-infrared reflectance spectroscopy is an effective tool for the rapid estimation of soil organic carbon (SOC). The development spectroscopic technology has increased application spectral libraries SOC research. However, direct prediction remains challenging due to high variability in types soil-forming factors. This study aims address this challenge by improving accuracy through classification. We utilized European Land Use Cover Area frame Survey (LUCAS) large-scale...

Abstract Plate fuel elements have the characteristic of more efficient heat transfer and are a potential new type assembly. As consumption reactor deepens, fission gas continues to accumulate may enter between cladding meat, causing blister. In case subcooled boiling flow coolant, thermal-hydraulic characteristics plate after blister received little attention. However, is problem that must be faced in design development assemblies. This paper investigated blisters using numerical simulation...