Gas power plants have a high requirement to the calorific value fluctuation and calorific value change rate

but the kinds of gas sources supplied to the gas power plants become more and more.So whether the increasingly complex gas quality(calorific value and wobbe index)can satisfy the strict requirement of gas power plants needs further research.Numerical simulation was focused on interchangemixing process of two gas sources with different calorific values replacement.Through instantaneous mass diffusion theory analysis and simulation results inductive research

the gas quality change properties and the formula of effective diffusion coefficient and Reynolds number were obtained.On this basis

the forecasting method for fluctuation rate of calorific value in interchange-mixing pipelines was established and the calculation results show that

for general gas transport speed

the distance meeting the requirement of gas power plants to heat value change rate is about 1km to 10 km

and the higher the flow speed

the longer the required distance.