Diesel Spray Ultra-High Injection, Paper Numerical Validation, ANSYS Fluent Tutorial
$200.00 Student Discount
- The problem numerically simulates Diesel Spray Ultra-High Injection using ANSYS Fluent software.
- We design the 3-D model by the Design Modeler software.
- We Mesh the model by ANSYS Meshing software.
- The mesh type is Structured, and the element number equals 675000.
- This project is simulated and validated with a reference article.
- We use the Discrete Phase Model (DPM) to define the fuel injection process.
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Description
Project Description
The present problem simulates fuel injection through an injector into a chamber by ANSYS Fluent software.
This simulation is based on the information in the article “Spray-induced air motion in single and twin ultra-high injection diesel sprays” and its results are compared and validated with the results in the article.
The fuel used in this model is diesel and its properties include density equal to 830 kg/m3, specific heat capacity equal to 1680 j/kg.K, droplet surface strain equal to 0.0255 n/m and viscosity equal to 0.0027888 kg/m.s.
An injection process is also defined to define the fuel injection process. Thus, the fuel flow is injected into the chamber with a flow rate of 14 g/s, a velocity of 850.23 m/s and a temperature of 298 K.
The diameter of the fuel particles is considered to be 0.00016 m and the type of fuel injection into space is defined as single. The duration of the injection process in the time interval is equal to 0.001 s.
The present 3-D model is designed using Design Modeler software. The meshing of the model has been done using ANSYS Meshing software and the mesh type is structured. The element number is 675000.
Diesel Spray Methodology
In this project, the discrete phase model (DPM) is used. The behavior of discrete phase particles in the unsteady state is also defined and it is also assumed that the behavior of the particles is affected by the continuous flow (interaction with the continuous phase).
The physical states defined for the discrete phase model include stochastic collision, which means that fuel particles collide with each other, coalescence, which means that fuel particles combine with each other, and breakup, which means the decay of fuel particles.
Diesel Spray Conclusion
At the end of the solution process, the results of the present numerical study are compared and validated with the results of the laboratory (experimental results)of the mentioned article.
Validation is based on Figure 3 of the article. Since the present simulation was performed at a time interval of 0.5 ms, the results of the numerical work were compared only in the first 0.5 ms.
This simulation was performed at an injection pressure of 300 MPa, which according to the Bernoulli principle, the particle injection rate is considered to be 850.23 m/s.
Also after the solution process, two-dimensional and three-dimensional contours related to velocity, DPM density, discrete phase model number and volume, and particle tracking in terms of residence time and diameter size are obtained for better understanding.
Call On WhatsApp
Saul Rath –
Hi, MR-CFD explained the concepts very well.
Miss Ruby Ledner II –
This simulation is a breakthrough in the field of diesel engine design and optimization!
Dr. Travis Wilkinson –
What is the meaning of Penetration Length compared to the reference paper?
MR CFD Support –
Hi, my friend
The penetration length is the distance from the nozzle outlet to the mass of the fluid in the computational range.
Simone Bechtelar –
Hi, I had a problem that I had to solve with the injection type group that used this product. Thankful
Carroll Osinski V –
The detailed visualization of the results is very helpful for understanding the diesel spray behavior.
Jadyn Mueller –
I’m very impressed with how the results from the simulation align with the experimental data from the paper. Can MR CFD’s tutorials be followed by someone new to ANSYS Fluent, or do they require prior experience with the software?
MR CFD Support –
Thank you for the positive feedback! MR CFD’s tutorials are designed to be as accessible as possible, allowing both beginners and experienced users to follow along. Newcomers to ANSYS Fluent will find step-by-step instructions and explanations that will help them through the learning process, while more advanced users can benefit from the specific insights and tips provided for more complex simulations.
Kyla Farrell –
Fantastic tutorial! It’s great to see the validation of the simulation against laboratory results. How closely did the simulation results match the experimental data from the article?
MR CFD Support –
The simulation results demonstrated a good agreement with the experimental data from the article. The validation was based on direct comparison for the first 0.5 ms of injection, considering variables such as velocity, DPM density, and particle size distribution. The match within the early injection phase indicates the correct setup and accuracy of the CFD model in capturing the essential physics of the diesel spray.
Dr. Kristofer Toy –
The ability to customize this simulation for different injection systems and fuel types is a game-changer!
Jadon Gibson V –
I appreciate the commitment to accuracy and validation in this simulation.