Relevant bibliographies by topics / Partially premixed combustion

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers
  5. Reports

Academic literature on the topic 'Partially premixed combustion'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Partially premixed combustion"

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Mikami, Masato, Kazuhiro Yamamoto, Osamu Moriue, and Naoya Kojima. "Combustion of partially premixed spray jets." Proceedings of the Combustion Institute 30, no. 2 (January 2005): 2021–28. http://dx.doi.org/10.1016/j.proci.2004.08.034.

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Peters, N. "Partially premixed diffusion flamelets in non-premixed turbulent combustion." Symposium (International) on Combustion 20, no. 1 (January 1985): 353–60. http://dx.doi.org/10.1016/s0082-0784(85)80521-x.

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Ozturk, Suat. "A Numerical Investigation on Emissions of Partially Premixed Shale Gas Combustion." International Journal of Heat and Technology 38, no. 3 (October 15, 2020): 745–51. http://dx.doi.org/10.18280/ijht.380319.

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The adiabatic, turbulent, and partially premixed combustions of several shale gases and air in a co-axial type combustor are computationally examined under the effects of different equivalence ratios, inlet temperatures, flow rates, humidity ratios, pressure, oxid inlet temperatures and flow rates, and swirl velocities in this study. Shale gases are extracted from Barnette, New Albany, Fayetteville, and Haynesville areas of USA. ANSYS software is used for numerical calculations of combustion. Results show that the maximum NO emissions for Barnette, New Albany, Fayetteville, and Haynesville shale gas occur at the equivalence ratio of 1.42, 1.41, 1.4, and 1.39. The rising fuel inlet temperature increase NO and reduces CO emissions after 300 K. The increasing humidity ratio causes NO and CO mass fractions to decrease. The ascending pressure raises NO up to 4 bar and lowers CO emissions. The increasing oxid flow rate abates the mass fractions of both NO and CO. The rising swirl velocity escalates NO up to 15 m/s and decreases CO emissions for all the shale gas combustions.
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Vanoverberghe, K. P., E. V. Van den Bulck, M. J. Tummers, and W. A. Hu¨bner. "Multiflame Patterns in Swirl-Driven Partially Premixed Natural Gas Combustion." Journal of Engineering for Gas Turbines and Power 125, no. 1 (December 27, 2002): 40–45. http://dx.doi.org/10.1115/1.1520159.

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Five different flame states are identified in a compact combustion chamber that is fired by a 30 kW swirl-stabilized partially premixed natural gas burner working at atmospheric pressure. These flame states include a nozzle-attached tulip shaped flame, a nonattached torroidal-ring shaped flame (SSF) suitable for very low NOx emission in a gas turbine combustor and a Coanda flame (CSF) that clings to the bottom wall of the combustion chamber. Flame state transition is generated by changing the swirl number and by premixing the combustion air with 70% of the natural gas flow. The flame state transition pathways reveal strong hysteresis and bifurcation phenomena. The paper also presents major species concentrations, temperature and velocity profiles of the lifted flame state and the Coanda flame and discusses the mechanisms of flame transition and stabilization.
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Hélie, J., and A. Trouvé. "Turbulent flame propagation in partially premixed combustion." Symposium (International) on Combustion 27, no. 1 (January 1998): 891–98. http://dx.doi.org/10.1016/s0082-0784(98)80486-4.

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Leermakers, C. A. J., P. C. Bakker, L. M. T. Somers, L. P. H. de Goey, and B. H. Johansson. "Commercial Naphtha Blends for Partially Premixed Combustion." SAE International Journal of Fuels and Lubricants 6, no. 1 (April 8, 2013): 199–216. http://dx.doi.org/10.4271/2013-01-1681.

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Leermakers, C. A. J., P. C. Bakker, L. M. T. Somers, L. P. H. de Goey, and B. H. Johansson. "Butanol-Diesel Blends for Partially Premixed Combustion." SAE International Journal of Fuels and Lubricants 6, no. 1 (April 8, 2013): 217–29. http://dx.doi.org/10.4271/2013-01-1683.

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LYONS, K. M., and K. A. WATSON. "Partially Premixed Combustion in Lifted Turbulent Jets." Combustion Science and Technology 156, no. 1 (July 2000): 97–105. http://dx.doi.org/10.1080/00102200008947298.

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Manente, V., B. Johansson, and W. Cannella. "Gasoline partially premixed combustion, the future of internal combustion engines?" International Journal of Engine Research 12, no. 3 (June 2011): 194–208. http://dx.doi.org/10.1177/1468087411402441.

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ROTARU, Constantin, George-Cristian CONSTANTINESCU, Oliver CIUICĂ, Ionică CÎRCIU, and Eduard MIHAI. "MATHEMATICAL MODEL AND CFD ANALYSIS OF PARTIALLY PREMIXED COMBUSTION IN A TURBOJET." Review of the Air Force Academy 14, no. 2 (December 8, 2016): 83–92. http://dx.doi.org/10.19062/1842-9238.2016.14.2.10.

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Dissertations / Theses on the topic "Partially premixed combustion"

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Porumbel, Ionut. "Large Eddy Simulation of premixed and partially premixed combustion." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14050.

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Large Eddy Simulation (LES) of bluff body stabilized premixed and partially premixed combustion close to the flammability limit is carried out in this thesis. The LES algorithm has no ad-hoc adjustable model parameters and is able to respond automatically to variations in the inflow conditions. Algorithm validation is achieved by comparison with reactive and non-reactive experimental data. In the reactive flow, two scalar closure models, Eddy Break-Up (EBULES) and Linear Eddy Mixing (LEMLES), are used and compared. Over important regions, the flame lies in the Broken Reaction Zone regime. Here, the EBU model assumptions fail. The flame thickness predicted by LEMLES is smaller and the flame is faster to respond to turbulent fluctuations, resulting in a more significant wrinkling of the flame surface. As a result, LEMLES captures better the subtle effects of the flame-turbulence interaction. Three premixed (equivalence ratio = 0.6, 0.65, and 0.75) cases are simulated. For the leaner case, the flame temperature is lower, the heat release is reduced and vorticity is stronger. As a result, the flame in this case is found to be unstable. In the rich case, the flame temperature is higher, and the spreading rate of the wake is increased due to the higher amount of heat release Partially premixed combustion is simulated for cases where the transverse profile of the inflow equivalence ratio is variable. The simulations show that for mixtures leaner in the core the vortical pattern tends towards anti-symmetry and the heat release decreases, resulting also in instability of the flame. For mixtures richer in the core, the flame displays sinusoidal flapping resulting in larger wake spreading. More accurate predictions of flame stability will require the use of detailed chemistry, raising the computational cost of the simulation. To address this issue, a novel algorithm for training Artificial Neural Networks (ANN) for prediction of the chemical source terms has been implemented and tested. Compared to earlier methods, the main advantages of the ANN method are in CPU time and disk space and memory reduction.
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Porumbel, Ionuţ. "Large Eddy Simulation of premixed and partially premixed combustion." Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-11042006-042840/.

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Thesis (Ph. D.)--Aerospace Engineering, Georgia Institute of Technology, 2007.
Yeung, Pui-Kuen, Committee Member ; Lieuwen, Tim, Committee Member ; Menon, Suresh, Committee Chair ; Seitzman, Jerry, Committee Member ; Syed, Saadat, Committee Member.
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Ravikanti, Veera Venkata Satyanarayana M. "Advanced flamelet modelling of turbulent non-premixed and partially premixed combustion." Thesis, Loughborough University, 2008. https://dspace.lboro.ac.uk/2134/34739.

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Current work focuses on the development and performance evaluation of advanced flamelet models for turbulent non-premixed and partially premixed combustion in RANS and large eddy simulation (LES) based modelling. A RANS-based combustion modelling strategy which has the ability to capture the detailed structure of turbulent non-premixed flames, including the pollutant NO, and account for the effects of radiation heat loss and transient evolution of NO, has been developed and incorporated into the in-house RANS code. The strategy employs an 'enthalpy defect'-based non-adiabatic flamelet model in conjunction with steady or unsteady nonadiabatic flamelets based NO submodels.
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Prasad, Vinayaka Nakul. "Large eddy simulation of partially premixed turbulent combustion." Thesis, Imperial College London, 2011. http://hdl.handle.net/10044/1/11871.

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Ranasinghe, D. J. "Modelling partially premixed turbulent combustion in a spark ignited internal combustion engine." Thesis, University of Cambridge, 2000. https://www.repository.cam.ac.uk/handle/1810/272095.

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Ruan, S. "Turbulent partially premixed combustion : DNS analysis and RANS simulation." Thesis, University of Cambridge, 2013. https://www.repository.cam.ac.uk/handle/1810/244504.

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Increasingly stringent regulation of pollutant emission has motivated the search for cleaner and more efficient combustion devices, which remain the primary means of power generation and propulsion for all kinds of transport. Fuel-lean premixed combustion technology has been identified to be a promising approach, despite many difficulties involve, notably issues concerning flame stability and ignitability. A partially premixed system has been introduced to remedy these problems, however, our understanding on this combustion mode needs to be greatly improved to realise its full potential. This thesis aims to further the understanding of various fundamental physical processes in turbulent partially premixed flames. DNS data of a laboratory-scale hydrogen turbulent jet lifted flame is analysed in this study. The partially premixed nature of this flame is established by examining the instantaneous and averaged reaction rates and the "Flame Index", which indicate premixed and diffusion burning modes coexisting. The behaviour of turbulent flame stretch and its relation to other physical processes, in particular the scalar-turbulence interaction, the effects of partial premixing on the displacement speed of iso-scalar surface and its correlation with the surface curvature are explored using DNS data. The scalar gradient alignment characteristics change from aligning with the most compressive strain to aligning with the most extensive one in regions of intensive heat release. This alignment change creates negative normal strain rate which can result in negative surface averaged tangential strain rate. The partial premixing affects the flame surface displacement speed through the mixture fraction dissipation rate and a second derivative in the mixture fraction space. The correlation of curvature and displacement speed is found to be negative in general and the effects of partial premixing act to reduce this negative correlation. The combined effects of the normal strain rate and the displacement speed/curvature correlation contribute to the negative mean flame stretch observed in the flame brush. Scalar dissipation rates (SDR) of the mixture fraction ẼZZ, progress variable Ẽcc and their cross dissipation rates (CDR) ẼcZ are identified as important quantities in the modelling of partially premixed flames. Their behaviours in the lifted flame stabilisation region are examined in a unified framework. It is found that SDR of mixture fraction is well below the quenching value in this region while SDR of progress variable is smaller than that in laminar flames. The CDR changes from weakly positive to negative at the flame leading edge due to the change in scalar gradient alignment characteristics. Axial and radial variation of these quantities are analysed and it is found that Ẽcc is an order of magnitude bigger than ẼZZ. ẼcZ is two orders of magnitude smaller than Ẽcc and it can be either positive or negative depending on local flow and flame conditions. Simple algebraic models show reasonable agreement compared to DNS when a suitable definition of c is used. Further statistics of the scalar gradients are presented and a presumed lognormal distribution is found to give reasonable results for their marginal PDFs and a bivariate lognormal distribution is a good approximation for their joint PDF. Four mean reaction rate closures based on presumed PDF and flamelets are assessed a priori using DNS data. The turbulent flame front structure is first compared with unstrained and strained laminar premixed and dif fusion flamelets. It is found that unstrained premixed flamelets give overall reasonable approximation in most parts of this flame. A joint PDF model which includes the correlation between mixture fraction and progress variable using a "copula" method shows excellent agreement with DNS results while their statistical independence does not hold in the burning regions of this partially premixed flame. The unstrained premixed flamelet with the correlated joint PDF method is identified to be the most appropriate model for the lifted jet flame calculation. This model is then used in the RANS simulation of turbulent jet lifted flames. A new model to include the contribution from diffusion burning and the effects of partial premixing due to SDR of mixture fraction is also identified and included in the calculation. These models are implemented in a commercial CFD code "Fluent" with user defined scalars and functions. It is found that both the correlated joint PDF model and the model accounting for the diffusive burning in partial premixing are important in order to accurately predict flame lift-off height compared to the experiments.
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Sadasivuni, S. K. "LES modelling of non-premixed and partially premixed turbulent flames." Thesis, Loughborough University, 2009. https://dspace.lboro.ac.uk/2134/5804.

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A large eddy simulation (LES) model has been developed and validated for turbulent non-premixed and partially premixed combustion systems. LES based combustion modelling strategy has the ability to capture the detailed structure of turbulent flames and account for the effects of radiation heat loss. Effects of radiation heat loss is modelled by employing an enthalpy-defect based non-adiabatic flamelet model (NAFM) in conjunction with a steady non-adiabatic flamelet approach. The steady laminar flamelet model (SLFM) is used with multiple flamelet solutions through the development of pre-integrated look up tables. The performance of the non-adiabatic model is assessed against experimental measurements of turbulent CH4/H2 bluff-body stabilized and swirl stabilized jet flames carried out by the University of Sydney combustion group. Significant enhancements in the predictions of mean thermal structure have been observed with both bluff body and swirl stabilized flames by the consideration of radiation heat loss through the non-adiabatic flamelet model. In particular, mass fractions of product species like CO2 and H2O have been improved with the consideration of radiation heat loss. From the Sydney University data the HM3e flame was also investigated with SLFM using multiple flamelet strategy and reasonably fair amount of success has been achieved. In this work, unsteady flamelet/progress variable (UFPV) approach based combustion model which has the potential to describe both non-premixed and partially premixed combustion, has been developed and incorporated in an in-house LES code. The probability density function (PDF) for reaction progress variable and scalar dissipation rate is assumed to follow a delta distribution while mixture fraction takes the shape of a beta PDF. The performance of the developed model in predicting the thermal structure of a partially premixed lifted turbulent jet flame in vitiated co-flow has been evaluated. The UFPV model has been found to successfully predict the flame lift-off, in contrast SLFM results in a false attached flame. The mean lift-off height is however over-predicted by UFPV-δ function model by ~20% for methane based flame and under-predicted by ~50% for hydrogen based flame. The form of the PDF for the reaction progress variable and inclusion of a scalar dissipation rate thus seems to have a strong influence on the predictions of gross characteristics of the flame. Inclusion of scalar dissipation rate in the calculations appears to be successful in predicting the flame extinction and re-ignition phenomena. The beta PDF distribution for the reaction progress variable would be a true prospect for extending the current simulation to predict the flame characteristics to a higher degree.
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Lu, Pin. "Investigation of gasoline partially premixed combustion in a single cylinder optical diesel engine." Thesis, Brunel University, 2014. http://bura.brunel.ac.uk/handle/2438/10463.

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Gasoline Partially Premixed Combustion (PPC) was investigated in a single cylinder optical diesel engine. The PPC operation was achieved with a combination of high dilution and higher intake charge temperature at part-load conditions using Primary Reference Fuel (PRF). The relative air/fuel ratio (λ) was set to 2.3 and the EGR rate at 22%. Split injections of three fuel distribution strategies (50:50, 70:30 and 30:70) were studied. In addition, the effect of injection pressure (900 and 1200 bar) was investigated for each injection timing. The emission and performance of the gasoline PPC operations were then compared with those of the baseline diesel combustion operation. Based on the thermodynamic analysis of the engine performance, detailed in-cylinder studies were carried out by means of optical techniques. The high speed imaging technique was employed to observe the fuel spray development and combustion processes. A simultaneous Mie-LIF technique was then developed and utilized for the visualization of fuel liquid and vapour formation.
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AlAdawy, Ahmed S. "Effects of Turbulence on NOx Emissions from Lean Perfectly-Premixed Combustion." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1406808796.

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Keeler, Benjamin. "Constraints on the operation of a DI diesel engine in partially-premixed combustion mode." Thesis, University of Nottingham, 2009. http://eprints.nottingham.ac.uk/10760/.

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Partially-premixed Charge Compression Ignition (PCCI) combustion is defined by increased levels of premixed charge whilst retaining control over combustion through injection timing. An experimental investigation has been carried out on a current generation DI diesel engine, equipped with High Pressure Common Rail (HPCR) fuel injection equipment and an external Exhaust Gas Recirculation (EGR) system. The aims of the investigation were to determine the constraints imposed on operating a PCCI combustion strategy with the aim of simultaneously reducing engine-out net soot and NOx emissions. The work was carried out at fully-warm steady-state conditions at engine speeds of 1500 rpm and 1800 rpm, predominantly using a single injection strategy. With a single injection the Start of Injection (SOI), fuel rail pressure, and rate of EGR have been examined with a view to realising PCCI combustion. Timing ranges of -20º to +3ºATDC, rail pressures of 500-1200 bar, and EGR rates of 0-60% have been investigated. The responses looked at have been engine-out soot, NOx, HC, and CO emissions, fuel consumption, and combustion noise. It is shown that variation of the parameters has allowed PCCI combustion to be achieved in a restricted operating region, offering improvement in the NOx-soot trade-off. This region is limited on the available test engine by oxygen availability due to the specifications of the turbocharger and EGR systems. Engine speeds up to 2000 rpm (at 2.5 bar BMEP), and loads of 4.4 bar gross IMEP (at 1500 rpm) have been found to be the limits, beyond which soot and CO emissions rise excessively. It is shown that enhancing the mixing time and intensity are both desirable in achieving PCCI combustion. The net soot reduction mechanism exploited with PCCI combustion strategies is reducing soot formation to outweigh the reduction in oxidation. Enhancing the mixing intensity by increasing injection pressure is highly effective at reducing soot output, but at the expense of brake specific fuel consumption. Increasing the mixing time can also be effective in reducing soot output, but careful parameter selection is required to avoid excessive soot output. Retarded or highly advanced injection timings are shown to reduce net soot output, but both have associated trade-offs and penalties. Retarding combustion is effective at lowering soot and NOx emissions with low associated noise, but a fuel economy penalty is paid. Advanced combustion phasing can result in large peak rates of increase of pressure, which have been shown to correlate well with combustion noise. Overall soot reductions of up to 97% were achieved, but with associated penalties. One of the most acceptable reductions of ~90% came at the cost of a 6% increase in fuel consumption, highlighting that improvements in emissions are achievable with PCCI strategies with acceptable trade-offs.
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Book chapters on the topic "Partially premixed combustion"

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Vervisch, Luc, and Pascale Domingo. "LES of Partially Premixed Combustion." In IUTAM Symposium on Turbulent Mixing and Combustion, 235–49. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-017-1998-8_19.

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Herrmann, Marcus, Bernd Binninger, Norbert Peters, Julien Réveillon, and Luc Vervisch. "Modeling Partially Premixed Turbulent Combustion." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design (NNFM), 139–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-45693-3_9.

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Herrmann, M., M. Chen, B. Binninger, N. Peters, V. Favier, J. Réveillon, and L. Vervisch. "Modeling partially premixed turbulent combustion." In Numerical Flow Simulation II, 161–80. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-540-44567-8_10.

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Kohli, Surbhi, and Abhijit Kushari. "Emissions and Soot in Partially Premixed Combustion." In Novel Combustion Concepts for Sustainable Energy Development, 433–56. New Delhi: Springer India, 2014. http://dx.doi.org/10.1007/978-81-322-2211-8_19.

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Haworth, D. C., C. Jiménez, B. Cuenot, T. Poinsot, and R. J. Blint. "Numerical Simulations of Partially Premixed Turbulent Combustion." In IUTAM Symposium on Turbulent Mixing and Combustion, 427–37. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-017-1998-8_37.

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Tunestål, Per, and Magnus Lewander. "Model Predictive Control of Partially Premixed Combustion." In Automotive Model Predictive Control, 171–81. London: Springer London, 2010. http://dx.doi.org/10.1007/978-1-84996-071-7_11.

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Domingo, P., and L. Vervisch. "Autoignition of Nonpremixed Turbulent Mixtures: Partially Premixed Combustion." In Direct and Large-Eddy Simulation II, 331–41. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5624-0_31.

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Favier, V., L. Vervisch, M. Herrmann, P. Terhoeven, B. Binninger, and N. Peters. "Numerical Simulation of Combustion in Partially Premixed Turbulent Flows." In Numerical Flow Simulation I, 203–21. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-540-44437-4_10.

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Favier, V., L. Vervisch, M. Herrmann, P. Terhoeven, B. Binninger, and N. Peters. "Numerical Simulation of Combustion in Partially Premixed Turbulent Flows." In Notes on Numerical Fluid Mechanics (NNFM), 203–21. Wiesbaden: Vieweg+Teubner Verlag, 1998. http://dx.doi.org/10.1007/978-3-663-10916-7_10.

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Hilbert, Renan, Dominique Thévenin, and Luc Vervisch. "Partially-Premixed Combustion during Autoignition of a Turbulent Nonpremixed Flame." In Direct and Large-Eddy Simulation IV, 121–28. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-017-1263-7_15.

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Conference papers on the topic "Partially premixed combustion"

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Noehre, Christof, Magnus Andersson, Bengt Johansson, and Anders Hultqvist. "Characterization of Partially Premixed Combustion." In Powertrain & Fluid Systems Conference and Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2006. http://dx.doi.org/10.4271/2006-01-3412.

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Stone, Christopher, and Suresh Menon. "LES of Partially-Premixed Unsteady Combustion." In 41st Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-310.

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Zimmermann, Ilona, and Michael Pfitzner. "Combustion Modeling of Partially Premixed Flames." In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-22423.

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Accurate and properly validated turbulence-chemistry interaction models for RANS combustion computational fluid dynamics (CCFD) simulations are required in support of the development process of modern gas turbine combustors. Although standard models are available for fully premixed and purely non premixed turbulent combustion, models describing partially pre-mixed combustion are still under development. A new model for the simulation of turbulent partially premixed combustion is presented, which combines features of non premixed and fully pre-mixed combustion models and reduces to these respective standard models in the limiting cases. Transport equations for mixture fraction and its variance as well as one progress variable are solved. Fluctuations of mixture fraction are taken into account through a presumed beta PDF assumption. The laminar flame speed for the whole range of mixture fractions is evaluated using correlations for lean and rich extinction limits based on experimental results from the literature. The model is validated using hydrogen and methane jet flames.
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Vedharaj, S., R. Vallinayagam, Yanzhao An, Alaaeldin Dawood, Mohammad Izadi Najafabadi, Bart Somers, Junseok Chang, and Bengt Johansson. "Fuel Effect on Combustion Stratification in Partially Premixed Combustion." In 13th International Conference on Engines & Vehicles. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2017. http://dx.doi.org/10.4271/2017-24-0089.

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Hu, Bing, Rahul Jhavar, Satbir Singh, Rolf D. Reitz, and Christopher J. Rutland. "Combustion Modeling of Diesel Combustion with Partially Premixed Conditions." In SAE World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2007. http://dx.doi.org/10.4271/2007-01-0163.

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Ferreira, Daniel, Pedro Lacava, Marco Ferreira, and João Carvalho Jr. "Experimental Aspects of Partially Premixed Pulsating Combustion." In 3rd International Energy Conversion Engineering Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2005. http://dx.doi.org/10.2514/6.2005-5555.

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Rousselle, Christine Mounaim, Fabrice Foucher, and Amine labreche. "Optimization of Gasoline Partially Premixed Combustion Mode." In SAE/KSAE 2013 International Powertrains, Fuels & Lubricants Meeting. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2013. http://dx.doi.org/10.4271/2013-01-2532.

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Walker, Michael, Robert Kelso, Kevin Bowes, Len Hamilton, Dianne Luning Prak, and Jim Cowart. "Partially Premixed Combustion Application for Diesel Power Improvement." In ASME 2017 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icef2017-3544.

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A partially premixed combustion (PPC) approach was applied in a single cylinder diesel research engine in order to characterize engine power improvements. PPC is an alternative advanced combustion approach that generally results in lower engine-out soot and NOx emission, with a moderate penalty in engine-out unburned hydrocarbon (UHC) and carbon monoxide (CO) emissions. In this study PPC is accomplished with a minority fraction of jet fuel injected into the intake manifold, while the majority fraction of jet fuel is delivered directly to the combustion chamber near the start of combustion (SOC). Four compression ratios (CR) were studied. Exhaust emissions plus exhaust opacity and particulate measurements were performed during the experiments in addition to fast in-cylinder combustion metrics. It was seen that as CR increased the soot threshold equivalence ratio decreased for conventional diesel combustion, however this afforded an increased opportunity for higher levels of port injected fuel leading to power increases from 5 to 23% as CR increased from 14 to 21.5. PPC allowed for these power increases (defined by a threshold opacity level of 3%) due to smaller particles (and lower overall number of particles) in the exhaust that influence measured opacity less significantly than larger and more numerous conventional diesel combustion exhaust particulates. Carbon monoxide levels at the higher PPC driven power levels were only modestly higher, although NOx was generally lower due to the overall enriched operation.
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Northrop, William F., Lucas M. Vanderpool, Praveen V. Madathil, Dennis N. Assanis, and Stanislav V. Bohac. "Investigation of Hydrogen Emissions in Partially Premixed Diesel Combustion." In ASME 2009 Internal Combustion Engine Division Fall Technical Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/icef2009-14063.

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Abstract:
Partially premixed combustion strategies offer many advantages for compression ignition engines. One such advantage for engines operating on diesel fuels is the simultaneous reduction of soot and NOX achievable over a wide range of equivalence ratios. Though often not measured in engine experiments, gaseous H2 is a byproduct of incomplete combustion and can be useful for the regeneration of aftertreatment devices. Correlations for the exhaust concentration of H2, mostly derived from experiments with homogeneous spark ignition engines, indicate that it is emitted either in proportion to CO directly or as a function of a pseudo-water gas shift equilibrium constant. In this work, H2 is measured over a range of equivalence ratios in a multi-cylinder diesel engine operating in a partially premixed low temperature combustion (LTC) mode using both low sulfur diesel fuel and soy-based biodiesel. Biodiesel was found to have the same bulk gas emissions of major species including H2 over the range of equivalence ratio in LTC for a constant load and combustion phasing. It also was found that the experimental H2 concentration was near the value predicted by the equilibrium constant for equivalence ratios greater that 0.9 but was increasingly lower for leaner points.
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10

Stola, Federico, Vittorio Ravaglioli, Giacomo Silvagni, Fabrizio Ponti, and Matteo De Cesare. "Injection Pattern Investigation for Gasoline Partially Premixed Combustion Analysis." In 14th International Conference on Engines & Vehicles. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2019. http://dx.doi.org/10.4271/2019-24-0112.

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Reports on the topic "Partially premixed combustion"

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Robert W. Pitz, Michael C. Drake, Todd D. Fansler, and Volker Sick. Partially-Premixed Flames in Internal Combustion Engines. Office of Scientific and Technical Information (OSTI), November 2003. http://dx.doi.org/10.2172/817088.

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