Kansuwan, Panya

Preferred name

Kansuwan, Panya

Alternative Name

Kansuwan, P.

Main Affiliation

School of Engineering

panya.ka@kmitl.ac.th

Now showing 1 - 8 of 8

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Design optimization on Ross yoke mechanism for stirling engine
(2026-05-15)
Jaisue, Apirat
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Kansuwan, Panya
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Kwankaomeng, Sutapat
This paper presents a design analysis and optimization of an Alpha-type Stirling engine with a double-acting mechanism. The engine has four cylinders with a piston diameter and length of 60 mm and 113.2 mm, respectively. Using the Ross yoke with a double-acting mechanism, the engine has a swept volume and stroke of 384.69 cm3 and 34 mm. The working gas is 10 bar pressurized air. ADAMS software is used to access dynamic balancing and kinematic analysis. Operating characteristics and performance were investigated and parameterized for optimization. Minimizing the stroke difference of four pistons, uniform piston stroke, is the objective function with the top and bottom-dead constraints. The length of the rocking lever attached to the yoke link influences the smooth reciprocating of all pistons. The simulation results with searching method optimization show the dynamic motion of the Ross yoke mechanism that can be adjusted to the optimal piston stroke with the suitable length of the rocking lever.
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Effect of regenerator on V-type alpha Stirling engine performance
(2021-09-15)
Senviboon, Varit
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Kansuwan, Panya
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Silpsakoolsook, Banterng
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Kwankaomeng, Sutapat
This paper presents the performance of an Alpha-type Stirling engine with and without a regenerator. The Alpha Stirling engine with a V-cylinder arrangement has two pistons that fit in hot and cold cylinders separately. The prototype engine has swept volume of 79 cm3. Working gas is ambient air and coolant is water. The engine performance test was conducted in two operating modes as a heat pump and a heat engine. Working as a heat pump, temperature drop at the cold cylinder was measured relative to work input from an induction motor. By varying its speed using an inverter, the cooling curves of the engine with and without regenerative heat exchanger were obtained for comparison. Working as a heat engine, on the contrary, heat input instead of work input as in the heat pump was applied to the engine by a fuel burner at a constant feed rate of LPG. The temperature on the cold cylinder is controlled by cooling water from the cooler. By varying the cooling water temperature, the variations of work output were measured from the output shaft by the rope brake dynamometer. The performance results of the two operating modes with and without regenerator were compared.
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Dry rolling-sliding wear behavior of ER9 wheel and R260 rail couple under different operating conditions
(2023-04-15)
Tosangthum, N.
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Krataitong, R.
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Wila, P.
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Koiprasert, H.
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Buncham, K.
This work aimed to evaluate the effects of contact stress and slip ratio on wear and rolling contact fatigue of ER9 wheel steel and R260 rail steel couple under unlubricated conditions using a dual disk test. It was demonstrated that as either contact stress or slip ratio increased, so did the wear rate and surface damage of both ER9 wheels and R260 rail rollers. The wear rate of the ER9 wheel steel containing proeutectoid ferrite and the smaller structure size of pearlite increased significantly when compared to the rail steel containing fully pearlite in each pair. After testing according to the conditions used in this work, the surface hardness of the pearlitic rail steel was higher than that of the ferrite-pearlite wheel steel. The average hardening ratio of ER9 wheel steel and R260 rail steel was 0.7 and 1.28, respectively. This was consistent with the subsurface deformation angle. With full pearlite in the microstructure of rail steel, the main wear mechanism was predominantly caused by fatigue cracking and peeling, with some adhesive wear. Whereas the most prominent mechanism of the ferrite-pearlite wheel steel was adhesive wear, which was followed by spalling and small fatigue cracks.
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Study of Rolling Contact Fatigue Mechanism of ER9 and R260 Wheel/Rail Materials
(2024-10-24)
Sukhom, Aunna
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Talingthaisong, Thanaporn
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Sucharitpwatskul, Sedthawat
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Manonukul, Anchalee
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Kansuwan, Panya
In railway operations, surface cracks due to rolling contact fatigue (RCF) are stress-induced defects that require further examination. The crack initiated at the wheel/rail interface propagates and thus leads to serious safety issues at the final fracture stage. This paper applies a cylinder-to-ball type of rolling contact fatigue rig to investigate the effect of contact pressure on rolling contact fatigue mechanisms and surface damage microstructure of ER9 wheel steel and R260 rail steel materials. Employing Hertzian contact theory, applied compressive forces used for different pressures were determined. The experiments were performed under dry conditions similar to most running trains. Results indicate that when the contact pressure increases, so does the severe surface damage. The service life of the materials decreases as stress increases. R260 rail material has a service life longer than ER9 wheel material at low contact pressure, but at contact pressures above 2.7 GPa, R260 rail material outperforms ER9 wheel material. Fractographic investigation demonstrates rolling contact fatigue damage evolution from flat surfaces to damaged surfaces in the form of flaking and spalling. Accelerometer measurements capture the damage mechanism stages from the crack nucleation stage of the test at acceleration amplitudes ranging from 0.5 to 0.75 times the force of gravity (G). A contact band appears on the specimen surfaces before the amplitude increases abruptly to about 1.0 G when surface cracks appear. Traces of surface cracking along the edge of the contact band cause stepwise acceleration jumps to 1.5 G, at which we ended the tests.
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Heat transfer enhancement and investigation on Stirling engine heater with biomass application
(2021-09-15)
Tuntrakeun, Punsa
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Kansuwan, Panya
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Kwankaomeng, Sutapat
This research presents a heat transfer enhancement technique on a Stirling engine heater equipped with a biomass fuel burner. ANSYS Fluent software was utilized in the computation of heat transfer, including heat flux and temperature distribution on the heater component of the engine. Effects of the increasing of the heating surface on heat transfer enhancement were investigated. Fin effectiveness resulting from the fin parameter variation of the heater, such as fin diameter and fin spacing, was evaluated for heat transfer under forced convection and heat conduction. This simulation results in the fin configuration most suitable for the fabrication of our Stirling engine heater.
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Effect of Pitting on the Yield Strength and Elastic Modulus for Assessment and Redesign
(2021-10-01)
Kaewpun, Yoottapong
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Sriromreun, Parkpoom
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Kansuwan, Panya
The pressure vessel is the current equipment that carries fluid, gas, or some solids under pressure. It can be very dangerous if it is neglected. Pitting corrosion is one of the failures that might be difficult to predict. To ensure safe usage of the vessel and to accurately predict and assess, it is necessary to comprehend the effect of pitting corrosion on the mechanical property of the material. The elastic modulus and the yield strength were investigated. A finite element analysis was performed with pitted plates subjected to a tension load. The results showed that the elastic modulus and the yield strength decreased with an increase in the percentage of volume damage by pitting or a decrease in equivalent thickness. It was found that calculating the reduction of the elastic modulus and the yield strength was more specific than simulating it due to the stress concentrator from pitting.
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Dry-sliding wear of the 316L/h-BN composites produced under crack ammonia atmosphere
(2020-01-01)
Chusong, Ekkarat
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Kansuwan, Panya
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Ohtake, Naoto
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Wila, Pongsak
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Tosangthum, Nattaya
Wear is one of different problems in mechanical failures of moving components. When a component encounters friction force on its surface, crack initiation tends to occur and wear follows crack propagation. Thus, the moving parts of automobiles should have proper wear resistance for long-time services, in addition to having high strength and hardness for heavy load operation. A self-lubricating material with compromised tribological and mechanical properties is important for some moving components. In this work, self-lubricating composites, metal matrix composites embedded with a solid lubricant, made from 316L stainless steel powder mixed with different hexagonal boron nitride (h-BN) contents of 10%, 15% and 20% by volume. The mixed powders were compacted into green parts (according with MPIF Standard 42) with density of 6.5 g·cm<sup>-3</sup>. Then, the green parts were sintered at 1100, 1150, 1200, 1250 and 1300°C under cracked ammonia (75% H<inf>2</inf>+25% N<inf>2</inf>) atmosphere for 60 min. The experimental results revealed that increases of hardness and strength sintered 316L matrix by reduction of pore amount and size were due to the increase of sintering temperature. However, the increase of h-BN content resulted in increase of pore amount and size. Additions of h-BN content up to 20 vol. % reduced friction coefficient of the sintered composites. At sintering temperatures of equal to and higher than 1200°C, h-BN did not react with 316L stainless steel powders to form intergranular boride phase. The sintered composites produced under the maximum experimental sintering temperature of 1300°C showed low specific wear rate.
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Grain boundary plane rotation analysis for FCC bicrystal structures using MD simulation
(2022-03-01)
Chiba, Ryoichi
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Kansuwan, Panya
Grain boundary (GB) plane rotation, one of the GB engineering mechanisms, was investigated using the activation-relaxation technique by molecular dynamics simulation. The simulation systems considered in this work are bicrystals with Lennard-Jones-type interatomic potential. The systems of four GB types established are symmetric (SYM), asymmetric (ASYM), symmetric zigzag (SZ), and high-angle zigzag (HZ) models. Of the first two models, ς5 (310) for SYM and 36.87∘ tilted for ASYM particularly provided reference atomic potential energy distributions and structures at minimum energy state at 0 K. The characteristic of SYM is the discrete atomistic potential distributions which are distinct from ASYM. The other two models based on zigzag-like GBs were created by rotating GB planes about [001] at the center of a ς5 (310)GB system for the SZ case and a high-angle GB system for the HZ case. Simulation results show that the initially tilted GBs kinetically transferred to relaxed states for shorter-length GBs through a series of curved GBs. The GBs consist of different combinations of order defect segments, amorphous regions, and defect-free regions. A mechanism proposed is the GB plane rotation, the rate of which is structure-dependent. A low-ς coincidence site lattice boundary section can stabilize the systems at a specified metastable state.

Kansuwan, Panya

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