Taking the Yunying underground energy storage of layered salt rock in Hubei province as a demonstration project,a similar simulation experimental platform of concentration field in construction period of salt caverns was established based on the similar theory of dimensional analysis.The concentration distribution in salt rock cavity with interlayer in construction period was studied for providing the theory basis of shape optimization.The results showed that when there are interlayers existing in the cavity,the concentration of brine is subjected to exponential distribution with time,which is the same as that without interlayer.Except for boundary layer,the concentration of brine around the interlayer in the same level is uniformly distributed.When the cavity has a single short interlayer which located over the water inlet,the concentration of brine around the interlayer will decrease compared with the cavity with no interlayer,but the concentration of brine which below the water inlet will keep un-changed.When the single short interlayer is located under the water inlet,the concentration of brine which over the interlayer will increase and the concentration gradient around the interlayer in vertical direction will decrease. When there are two interlayers existed in the cavity,the concentration of brine around the interlayer will change accordingly,and the cavity’s concentration will increase integrally. Lengthening the interlayer,the trend of the brine’s concentration with depth will stay the same, but it will increase the concentration of the cavity.
