Bouncing flame

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Bouncing flame. Dudin Maxim Lyceum № 130. Problem. Place a flame (e.g. from a Bunsen burner) between two charged parallel metal plates. Investigate the motion of the flame. The investigation plan. To observe the phenomenon To study the causes of the phenomenon - PowerPoint PPT Presentation

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Bouncing flameDudin MaximLyceum 130ProblemPlace a flame (e.g. from a Bunsen burner) between two charged parallel metal plates. Investigate the motion of the flame.The investigation planTo observe the phenomenonTo study the causes ofthe phenomenonTo rate the deviation angle of the flame theoreticallyTo build the setup and rate deviation angle of the flame experimentallyTo compare the theory with experiments Observation of the effect

-+Beginning position 4Scheme of burningEvaporation of paraffin Reaction zoneAfterburning zoneC32H68+49O232CO2+34H2OIonization+++-Maximum ionization is in the flame front, where chemical processes take place , , 2 10 6Charge distribution-++++++-----Theoretical explanation of deviation and bounces

-Part with positive charge +Part with negative chargeCharged parts of the flame are under influence of Coulomb forceFlame starts to deviateCharge concentration is changingThe visible part of the flame start to bounce

-+Charge fly out, concentration varies at the given point 9Force applyingY

X10Calculation of buoyancy and gravitation force Value of the flame is 1,3 cm2 , temperature is 1567 K Calculation of Coulomb force- Positive charge

Using Mendeleev-Clapeyron equation we can calculate N: Calculation of ionization degreeSahas formula was used to calculate the degree of heat ionization in gas:CO2 13.79 . 13Theoretical dependenceSetupCurrent source, 12VVoltage transformer, 12V-5kV+-

, 15Experiment

5 cm between platesDeviation of the upper edge of the flame in the horizontal 1.9 cm-+ 16Dependence of angle of upper edge deviation on the distance between the platesAngle of upper edge deviation, Electric field, N/m*10^6Results of the researchPhenomenon was observedTheoretical explanation of the effect was suggested:Chemical properties and ionization were investigatedMain reason of deviation applying of the Coulomb forceMain reason of bounces changing of charge at the given pointTheoretical dependence of deviation angle on electric field was madeAll the forces were calculatedExperimental dependence of deviation angle on electric field was madeWe've compared theoretical results with experimental results

Thanks for attentionVoltage measurementTo current sourceR1, 50R2, 50kV+- , , , , 20Change of distance between the plates

4 cm between platesFlame touches the plate-+Theory and practiceChemistry of candle burningC32H68+49O232CO2+34H2OC32H68C+H2C+O2 CO22H2+O2 2H2O

23Measurement of the horizontal deviation

Distance between upper edge of the flame and verticalVerticalMeasurement of the angle

Line through the upper edge of the flame and wickVerticalDependence of horizontal deviation on the electric fieldElectric field, N/m*10^6Horizontal deviation, cmScheme of ionizationFront of flame, where reaction takes placeInner cone of flameEvaporation of paraffinAfterburningzone---+++++Dependence of angle of upper edge deviation on the distance between the platesAngle of upper edge deviation, Electric field, N/m*10^6