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Rowland S. Benson

Bio: Rowland S. Benson is an academic researcher from University of Manchester. The author has contributed to research in topics: Reciprocating compressor & Combustion. The author has an hindex of 10, co-authored 22 publications receiving 379 citations.

Papers
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Journal ArticleDOI
TL;DR: In this paper, a comprehensive simulation model for a spark ignition engine including intake and exhaust systems is presented, and the model predictions compare favourably with previous work, which compare well with experimental results.

120 citations

Journal ArticleDOI
TL;DR: In this paper, a number of methods for representing the losses in radial gas turbines for predicting the off-design performance are reviewed, and it is shown that reasonable predictions of the turbine performance may be made using one-dimensional theories if the nozzle gas exit angle is based on the cos−1(o/s) rule with some deviations due to rotor speed.

58 citations

Journal ArticleDOI
TL;DR: In this article, a method for describing quantitatively a mixing-displacement scavenge model for the gas exchange process in a two-stroke cycle engine is presented. But it is shown that at high charging efficiencies there is an improvement in engine performance compared with calculations using the mixing process alone.

38 citations

Book ChapterDOI
01 Jan 1979

37 citations

Journal ArticleDOI
TL;DR: In this article, a gas dynamic model is developed to represent the gas exchange process in a cross or looped scavenged engine based on Dedeoglu's4 experiments, where the scavenge process is considered to be in three phases, a displacement phase, a short-circuiting phase and a mixing phase.

24 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, two diesel engine models, a mean torque production model and a cylinder-by-cylinder model, are summarized for use in the formulation of control and state observation algorithms.
Abstract: Engine models that are used for nonlinear diesel engine control, state estimation, and model-based diagnostics are presented in this paper. By collecting, modifying, and adding to current available engine modeling techniques, two diesel engine models, a mean torque production model and a cylinder-by-cylinder model, are summarized for use in the formulation of control and state observation algorithms. In the cylinder-by-cylinder model, a time-varying crankshaft inertia model is added to a cylinder pressure generator to simulate engine speed variations due to discrete combustion events. Fuel injection timing and duration are control inputs while varying engine speed, cylinder pressure, and indicated torque are outputs from simulation. These diesel engine models can be used as engine simulators and to design diesel engine controllers and observers.

278 citations

Journal ArticleDOI
01 Jan 1982
TL;DR: In this article, the laminar burning velocities of methanol, ethanol and isooctane with equivalence ratio of 1.075, as well as 0.50, 0.47, and 0.455 m/s, were determined using a constant volume bomb.
Abstract: Variation of the laminar burning velocities of methanol, ethanol and isooctane with equivalenceratio, pressure and temperature were determined using a constant volume bomb. Measurements were conducted during the prepressure period of combustion and a density correction scheme was employed for calculation of burning velocities from measured data. The maximum burning velocities of methanol, ethanol and isooctane occur at an equivalence ratio of 1.075, as 0.50, 0.47, and 0.455 m/s, respectively. Laminar burning velocity for the three fuels showed a pressure and temperature dependence in the following form, in the range of 0.1–0.8 MPa, and 300–500 K, Ul=Ulr (P/Pr)m(T/Tr)n where m is −0.2, −0.17 and −0.22 for methanol, ethanol and isooctane, respectively, for stoichiometric mixtures. The exponent n was found to be 1.75 for methanol and ethanol and 1.56 for isooctane. Obtained results agree, to a certain extent, with the limited experimental results of previous investigators.

181 citations

Journal ArticleDOI
TL;DR: An overview of multi-zone thermodynamic models for spark-ignition engines, their pros and cons, the model equations and sub-models used to account for various processes such as turbulent wrinkling, flame development, flame geometry, heat transfer, etc..

135 citations

Journal ArticleDOI
TL;DR: In this article, a one-dimensional meanline design approach for radial inflow turbines is described, which comprises a brute-force search algorithm that traverses the entire search space based on key non-dimensional parameters and rotational speed.
Abstract: A comprehensive one-dimensional meanline design approach for radial inflow turbines is described in the present work. An original code was developed in Python that takes a novel approach to the automatic selection of feasible machines based on pre-defined performance or geometry characteristics for a given application. It comprises a brute-force search algorithm that traverses the entire search space based on key non-dimensional parameters and rotational speed. In this study, an in-depth analysis and subsequent implementation of relevant loss models as well as selection criteria for radial inflow turbines is addressed. Comparison with previously published designs, as well as other available codes, showed good agreement. Sample (real and theoretical) test cases were trialed and results showed good agreement when compared to other available codes. The presented approach was found to be valid and the model was found to be a useful tool with regards to the preliminary design and performance estimation of radial inflow turbines, enabling its integration with other thermodynamic cycle analysis and three-dimensional blade design codes.

115 citations

Journal ArticleDOI
25 Mar 2013
TL;DR: In response to the current and future energy and environment challenges, the automotive industry is strongly focusing on improving the fuel efficiency of vehicles as mentioned in this paper, although the electrification of a vehicle is not a new topic.
Abstract: In response to the current and future energy and environment challenges, the automotive industry is strongly focusing on improving the fuel efficiency of vehicles. Although the electrification of a...

113 citations