A hydrodynamic prediction model of throttle orifice plate using space filling and adaptive sampling method
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INDUSTRIAL APPLICATION PAPER
A hydrodynamic prediction model of throttle orifice plate using space filling and adaptive sampling method Tengfei Tang1 · Gang Yang1 · Dijia Zhang1 · Lei Lei1 · Baoren Li1 · Longlong Gao1 Received: 13 August 2019 / Revised: 15 February 2020 / Accepted: 27 February 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The hydrodynamic prediction model improved design efficiency of the flow control application. A global sampling process with space filling method, adaptive sampling method, and neural network is proposed to generate a hydrodynamic prediction model for the flow control device. The optimized Latin hypercube sampling method is applied to create a uniform set of initial sample points for analysis. An automatic computational fluid dynamics analysis process is developed to provide data for the hydrodynamic objective of the multi-stage throttle orifice plate. By self-learning from previous sample points, the new sample points placed in the region of interest are collected by the adaptive sampling method in several iterations. Two numerical examples and the flow rate modeling for the throttle orifice plate are provided to demonstrate the approximation capability of the proposed process. Ten prediction model cases are established by a back-propagation feed-forward neural network, and the test data show that the model constructed by optimized Latin hypercube sampling and adaptive sampling has 1% mean relative error and 4.85% maximum relative error, which is nearly 25% more accurate than the optimized Latin hypercube sampling model. The proposed global sampling process is efficient to build the hydrodynamic prediction model and shows potential in the flow control design area. Keywords Hydrodynamic prediction model · Adaptive sampling · Optimized Latin hypercube sampling · Neural network · Throttle orifice plate
1 Introduction In flow control application design, it is effective to employ a computational fluid dynamics (CFD) method to simulate the fluid characteristics. However, significant computational resources are required with an increasing number of geometry parameters. The hydrodynamic model is a solution for flow character analysis in the preliminary design step, and data based on CFD simulations are generated for the model. Without additional CFD simulations, the flow characteristic results are obtained directly from the model.
Responsible Editor: Palaniappan Ramu Longlong Gao
[email protected] Tengfei Tang [email protected] 1
FESTO Pneumatics Centre, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
A throttle orifice plate is generally adopted in the fluid field as a typical flow control device; the other common flow control devices include globe valves, hydraulic valves, and pneumatic regulating valves. The throttle orifice plate has some advantages in structure and reliability, but its flow rate cannot be actively adjusted for its passive control structure. The CFD simulations hav
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