Thermal Barrier Coatings for High Output Turbocharged Diesel Engine

Saad, Dorsaf; Saad, Philipe; Kamo, Lloyd; Mekari, Milad; Bryzik, Walter; Schwarz, Ernest; Tasdemir, John

doi:10.4271/2007-01-1442

Cited by 27 publications

(12 citation statements)

References 7 publications

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“…For example, Adiabatics Inc. developed a proprietary high temperature polymer binder that can be mixed with ceramic powders [23]. According to the authors, heating the coating after application promotes "conversion of the polymer to ceramic".…”

Section: Research On Thermal Barrier Coating Materialsmentioning

confidence: 99%

An Investigation of Metal and Ceramic Thermal Barrier Coatings in a Spark-Ignition Engine

Marr

Wallace

Memme

et al. 2010

SAE Int. J. Engines

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The engine was operated in a standard full load mode and a knock promoting mode featuring heated intake air and advanced spark timing. Cylinder pressures were measured to quantify knock.It was found that average heat flux into the piston substrate was 33 % higher with the metal TBC and unchanged with the YSZ relative to the uncoated surface. The increase with the metal TBC was attributed to its surface roughness. However, the metal TBC and YSZ reduced peak heat flux by 69 and 77 %, respectively. Both the metal TBC and YSZ reduced knock compared to the uncoated surface. After testing, the metal TBC was undamaged and the YSZ was slightly chipped.ii DedicationTo my late grandpa Joseph.iii

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Section: Research On Thermal Barrier Coating Materialsmentioning

confidence: 99%

An Investigation of Metal and Ceramic Thermal Barrier Coatings in a Spark-Ignition Engine

Marr

Wallace

Memme

et al. 2010

SAE Int. J. Engines

View full text Add to dashboard Cite

show abstract

“…The objective was to go toward a low heat rejection engine (LHRE), a term generally referring to the thermal insulation of the combustion chamber using ceramic coatings. A large number of numerical and experimental studies were performed on this topic, 1,3–14 giving often contradictory or inconclusive results. An important limitation of this type of coating material, the most common being the partially stabilized zirconia (PSZ), was a decrease in volumetric efficiency.…”

Section: Introductionmentioning

confidence: 99%

Modeling investigation of thermal insulation approaches for low heat rejection Diesel engines using a conjugate heat transfer model

Poubeau

Arthur

Duffour

et al. 2018

International Journal of Engine Research

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Heat losses through combustion chamber walls are a well-known limiting factor for the overall efficiency of internal combustion engines. Thermal insulation of the walls has the potential to decrease substantially these heat losses. However, evaluating numerically the effect of coating and of its location in the combustion chamber and then design an optimized combustion system require the use of high-fidelity engine models. The objective of this article is to present the whole workflow implying the use of three-dimensional computational fluid dynamics techniques with conjugate heat transfer (CHT) models to investigate the potential benefits of a coating on a passenger car Diesel engine. First, the baseline combustion system is modeled, using CHT models to solve in a coupled simulation the heat transfers between the fluid in the intake and exhaust lines and in the combustion chamber, on one hand, and the solid piston, head and valves, on the other hand. Based on this setup, a second simulation is performed, modeling a thermo-swing insulation on all combustion chamber walls by a contact resistance, neglecting its thermal inertia to keep a manageable computational cost. Results show a decrease of 3.3% in fuel consumption with an increase in volumetric efficiency. However, decoupled one-dimensional/three-dimensional simulations highlight the inaccuracy of these results and the necessity to model the coating thermal inertia, as they show an overestimation of the heat insulation rate and, consequently, of the gain in fuel consumption (−2.1% instead of −1.6%), for a coating on the piston with no thermal inertia.

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“…Some variations in the results described here have been observed with coating thickness, thermal capacitance, coating structure, engine type, and components treated. 16–19 Additionally, temperature-swing coatings that utilize low volumetric heat capacity as well as low conductivity are being actively explored, 20–23 but the analysis methods used in this report did not allow for their application since wall temperatures were only solved once per engine cycle.…”

Section: Introductionmentioning

confidence: 99%

Light-duty single and multi-shaft boosting and compounding studies with in-cylinder insulation

Andruskiewicz

Durrett

Gopalakrishnan

et al. 2020

International Journal of Engine Research

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A set of two-cylinder engine concepts utilizing a supercharger and piston- or turbine-compounding were compared to a turbocharged engine modeled with a consistent methodology developed in previous works. In-cylinder insulation was added to each of the engines to evaluate the effects on performance. The goals of this simulation were to utilize energy that otherwise would be bypassed around the turbine side of a turbocharger and redirect it to the crankshaft, as well as to redirect energy that would previously have entered the coolant into the exhaust gases where it could be reclaimed by a second expansion process. Gains in performance and efficiency were thoroughly analyzed to provide insight into the magnitudes and mechanisms responsible. It was found that the second expansion process from exhaust-compounding was able to significantly improve engine performance at moderate to high loads, as well as compensate for the loss in volumetric efficiency that accompanies in-cylinder insulation. The piston-compounded single-shaft DCDE was able to outperform the turbocharged multi-shaft DCDE at mid to high loads, and in maximum brake power due to the low losses in the coupled nature of the second expansion, while the turbine-compounded engine suffers higher losses due to the turbomachinery mismatch with the positive displacement power cylinders.

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Thermal Barrier Coatings for High Output Turbocharged Diesel Engine

Cited by 27 publications

References 7 publications

An Investigation of Metal and Ceramic Thermal Barrier Coatings in a Spark-Ignition Engine

An Investigation of Metal and Ceramic Thermal Barrier Coatings in a Spark-Ignition Engine

Modeling investigation of thermal insulation approaches for low heat rejection Diesel engines using a conjugate heat transfer model

Light-duty single and multi-shaft boosting and compounding studies with in-cylinder insulation

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