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A phenomenological generalized ghost dark energy model has been studied underthe framework of FRW universe. In ghost dark energy model the energy densitydepends linearly on Hubble parameter (H) but in this dark energy model, theenergy density contains a the sub-leading term which is depends on $\mathcal{O}(H^2)$, so the energy density takes the form $\rho_D=\alpha H+ \beta H^2$,where $\alpha$ and $\beta$ are the constants. The solutions of the Friedmanequation of our model leads to a stable universe. We have fitted our model withthe present observational data including Stern data set. With the help of bestfit results we find the adiabatic sound speed remains positive throughout thecosmic evolution, that claims the stability of the model. The flipping of thesignature of deceleration parameter at the value of scale factor $a=0.5$indicates that the universe is at the stage of acceleration i.e. de Sitterphase of the universe at late time. Our model shows that the acceleration ofthe universe begin at redshift $z_{ace}\approx 0.617$ and the model is alsoconsistent with the current observational data.

Study of QCD generalized ghost dark energy in FRW universe