Turbine map

Turbine map

A turbine map is a graphical representation of the performance characteristics of a compressor/turbine system for a specific engine application. It is created using data on mass flow, pressure ratio, speed, and efficiency factors. The map is used to determine the optimal operating conditions for the turbine based on the variation of blade opening. Test data for the turbine characteristics at different blade openings are input into the map, resulting in a set of performance curves that can be used to optimize the engine's performance.From: Towards Green Marine Technology and Transport [2019], Optimization of diesel engine dual-variable geometry turbocharger regulated two-stage turbocharging system based on radial basis function neural network-quantum genetic algorithm [2021]

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Published in Ahmed F. El-Sayed, Aircraft Propulsion and Gas Turbine Engines, 2017

Ahmed F. El-Sayed

The parameters of the power turbine are the mass flow parameter m˙T4/P4, the pressure ratio P04/Pa, the speed parameter N/T04, and efficiency ηft. The free turbine map is illustrated in Figure 16.11.

Optimization of diesel engine dual-variable geometry turbocharger regulated two-stage turbocharging system based on radial basis function neural network-quantum genetic algorithm

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Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2021

Guangmeng Zhou, Ruilin Liu, Zhongjie Zhang, Chunhao Yang, Haojian Ding

A simulation model of dual-VGT RTST diesel engine is established in GT-power software. The model includes cylinders, injectors, turbochargers, crankcases, intercoolers, and intake and exhaust pipes, as shown in Figure 1. The combustion model uses the oil droplet evaporation model in the GT-power software (Hiroyasu and Arai 1990), and the heat transfer model directly uses the semi-empirical Woschni heat transfer model obtained by dimensional analysis (Woschni 1967). Since both high-pressure and low-pressure stage are VGT, and turbine characteristics vary with the variation of blade opening, 5 sets of Turbine characteristic test data are input into the “Turbine Map” template, corresponding to 20, 40, 60, 80, and 100%, respectively. The definition is applied using the following Formula:

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Optimization of diesel engine dual-variable geometry turbocharger regulated two-stage turbocharging system based on radial basis function neural network-quantum genetic algorithm