Experimental investigation of the effect of temperature on ignition of modified kerosene

Sundararaj, Aldin Justin; Guna, K R; William, Matthew

doi:10.1177/1468087420988191

Cited by 4 publications

(5 citation statements)

References 44 publications

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“…2 (approximately the driven and driver section have the same length). In contrast, diaphragm position‐1 and position‐3 models were pretty ideal in finding the IDT of Diesel fuels, as they provided a high Mach number and high reflected wave temperature values as in the references 48‐55 …”

Section: Resultsmentioning

confidence: 99%

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An experimental and numerical investigation of the effects of the diaphragm pressure ratio and its position on a heated shock tube performance

Badri

Elbashir

Saker

et al. 2022

Energy Science & Engineering

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The main purpose of this work was to investigate the performance of heated shock tube (ST) with different pressure ratios and diaphragm positions numerically and experimentally. The numerical model was developed to simulate the fluid flow inside a shock tube test facility located at Qatar University. The shock tube was a cast‐iron hollow tube with 6 m length, 50 mm internal diameter and 10 mm thickness. ST driver and driven sections were filled with helium–argon mixture and air. The driven section was heated up to 150°C using coils. At the middle of the ST, the diaphragm was made of aluminium sheet (0.5 mm) layers. Five different pressure ratios were implemented during the experiment, and performance evaluation depended on the strength of the incident shock Mach number. The inviscid numerical model solver used transient two‐dimensional time‐accurate Navier–Stokes CFD. The model introduced a parametric study regarding three different diaphragm positions (1m, 2m and 3m) and five pressure ratios (6–10) for each position. In addition to yielding the incident and reflected wave Mach number, reflected wave temperature was also considered a shock tube performance indicator. The incident Mach numbers for the diaphragm middle position from the experiment were compared against those conducted from the model, and good matching was observed. The parametric study results showed that at high‐pressure ratios, diaphragm Positions 1 and 3 could generate a 7.4% increase in shock wave Mach number compared with the diaphragm position‐2 model. Moreover, the diaphragm position‐3 model tends to have a 2% increase in the temperature behind the reflected shock wave compared with the other two positions.

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Section: Resultsmentioning

confidence: 99%

“…Diaphragm pressure ratio vs. incident Mach number (M i ) F I G U R E 1 0 Incident Mach number dependency on diaphragm location and pressure ratioMach number and high reflected wave temperature values as in the references[48][49][50][51][52][53][54][55] …”

mentioning

confidence: 99%

An experimental and numerical investigation of the effects of the diaphragm pressure ratio and its position on a heated shock tube performance

Badri

Elbashir

Saker

et al. 2022

Energy Science & Engineering

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“…Kerosene or paraffin may be a feasible choice. Justin Sundararaj et al [ 95 ] indicated that with the increase in the temperature from 26 to 60 °C, the viscosity of modified kerosene with the density of approximately 0.80 g/cc decreased from 1.33 to 0.90 cP.…”

Section: Prospectsmentioning

confidence: 99%

Measurement of Water Absorption of Recycled Aggregate

Duan

Zhao

et al. 2022

Materials

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Owing to the high absorption capacity of recycled aggregate (RA), it is crucial to accurately measure its saturated-surface-dried water absorption (WSSD), which largely affects an effective water-to-binder ratio of recycled aggregate concrete. In this study, existing measurement methods for the WSSD of RA are extensively reviewed, including Wiping, Slumping, Centrifugation, Infrared, Evaporation, Airflow drying, Conductivity, Pycnometer, Hydrostatic balance, and Extrapolation. In particular, the physical principles and operability of these methods are emphasized. It was determined that the accuracy of all test results was not satisfactory. For example, the water in pores with an open-ended direction that was opposite to the centrifugal force could largely be retained. In Airflow drying, the temperature change was significantly delayed. In addition, in Hydrostatic balance, RA would pre-absorb water before determining the initial reading. Therefore, several suggestions for optimizing these methods are presented, such as the combination of Evaporation and Airflow drying, the liquid selection in Hydrostatic balance, and the addition of a tiny mixer in each centrifuge tube. In summary, this review facilitates the development of an accurate and convenient method for measuring the WSSD of RA.

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“…The scramjet engine has gained a lot of attention in recent decades as a viable candidate for future hypersonic propulsion vehicles. [1][2][3][4] Fuel injection, mixing, and combustion are the scramjet engine's main challenges, particularly for heavy hydrocarbon fuels 5 that need a relatively long time for chemical reactions to continue. The well-known propulsion concepts pursued scramjet applications are the Dual-mode Combustion Ramjet (DMCR) and Dual Combustion Ramjet (DCR).…”

Section: Introductionmentioning

confidence: 99%

The non-reacting flow characteristics of pylon and wall injections in a dual combustion ramjet engine

Sebastin

Jeyakumar

Karthik

2021

International Journal of Engine Research

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The influence of pylon and wall injection in coaxial jets of a Dual Combustion Ramjet engine is numerically investigated in a non-reacting flow field. The supersonic combustor is modeled and analyzed using the commercial CFD software ANSYS 18.0. The three-dimensional compressible Reynolds-averaged Navier-Stokes (RANS) equations coupled with the SST k-ω turbulence model have been used to analyze the coaxial mixing characteristics of the jets. The numerical study is validated with the experimental data of the wall static pressures measured in the combustor’s flow direction. The pylon and wall injectors are located symmetrically at the gas generator’s exit nozzle, and the air is used as the injectant to simulate gaseous fuel. Three injection pressures are used for the study to understand the flow field characteristics in the injector regime. Also, the gas generator downstream direction is investigated. The shock waves generated from the gas generator nozzle enhance the mixing of the coaxial jets with minimum total pressure loss. The shock wave interactions are noticed with reducing intensity within the supersonic combustor for pylon injection, leading to higher total pressure loss than the wall injection. The pylon injection provides the spatial distribution of fuels compared to the wall injection in the coaxial supersonic flow field.

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Experimental investigation of the effect of temperature on ignition of modified kerosene

Cited by 4 publications

References 44 publications

An experimental and numerical investigation of the effects of the diaphragm pressure ratio and its position on a heated shock tube performance

An experimental and numerical investigation of the effects of the diaphragm pressure ratio and its position on a heated shock tube performance

Measurement of Water Absorption of Recycled Aggregate

The non-reacting flow characteristics of pylon and wall injections in a dual combustion ramjet engine

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